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formula of a hydrate lab answers chegg

7. An anhydrous salt is a For example, Glucose is C6H12O6; it’s empirical formula is CH2O. If the decrease in mass between these two weightings (weight after 1st heating and after 2nd heating) is more than 3 mg (0.003 g), repeat the heating once more and record the weight for the 3rd heating. Record the formula of your unknown anhydrous Salt 2. Experiment 1: The Mole Concept & The Chemical Formula of a Hydrate Name: Katarina Vallegos Lab Partners: None Date of Experiment: Course Number: CHE 112-C11 Abstract-The objective of this experiment was to use convert between grams and moles and utilize these conversions in obtaining an empirical formula of an anhydrous compound. In sodium carbonate decahydrate, 10 moles of water molecules are bound to each mole of Na:CO; or 180.20 g of H:0 per 105.99 g of Na2CO3. 6. This is the total mass of the Cruciable, lid and hydrate minus the mass of Cruciable and lid . If there is residue inside the crucible left over from a previous experiment, dump it out into the waste container and wipe the inside and outside with a dry paper towel. The ratio of moles of water to moles of compound is a small whole number. 2. 3. hydrates. Now, place the crucible with the hydrate on the clay triangle. Predict whether it would be too high or too low and explain your answer. The formula of a hydrate can be determined by dehydrating a known mass of the hydrate, then comparing the masses of the original hydrate and the resulting anhydrous solid. Created by. Monosaccharides. your calculations. | Position the Bunsen burner so that the hottest part of the flame, found at the tip of the inner blue cone is at the bottom of the crucible. Now, add the remaining hydrate from your packet (about 1 g) to the crucible. Show your Continue heating for 5 minutes. EXPERIMENT 2: HYDRATE PRE‐LABORATORY ASSIGNMENT Score: ___ /9 (To be completed prior to lab, read the experiment before attempting) 1. LAB REPORT-HYDRATES 34.33 20.35 79 Mass of crucible plus sample, g Mass of empty crucible with a lid.g27 Mass of a lid.g.. ,01 Mass of hydrate sample, g Mass of crucible and sample: after first heating.. after second heating06 after third heating, g. mass of water lost, g.. 0.IS mass percent of water in sample, % (show your calculations) Ba Cla Formula of anhydrous sat! single sugars. DO NOT put hot crucibles on a balance! Record the weight of the cooled crucible as "Mass of empty crucible" under Trial 1. & Why is it important to wait until water vapors are not coming Weigh your 2nd empty crucible and record this in your lab notebook under Trial 2 14. 4.                                                 STUDY. For more information about the lab please see the powerpoint provided in the message board and the recorded live lesson. Calcium sulfate is a white solid found as two hydrates, a hemihydrate known as plaster of Paris and a dehydrate known as gypsum. Hydrate, The molar ratio of anhydrous salt to the 3. Obtain help from your instructor if it does not glow red. View Lab Report - Formula Of A Hydrate from CHEM 1213 at Hinds Community College. Learn. 6. The hemihydrate is a white solid as shown in the figure below. Below or some typical results from this lab so you can see how the calculations work. Answer the following questions. Pastebin is a website where you can store text online for a set period of time. How confident are you that all of the water of hydration has been removed? molar mass of anhydrous magnesium chloride is 95.211 g/mol. The Mass of the anhydrous salt is 3.54g. Solution :- Chemical formula of hydrate A) moles of anhydrous KAl (SO4)2 Molar mass of KAl (SO4)2 = 258.21 g /mol Mass of anhydrous KAl (SO4)2 = [mass of aluminium cup + alum after 2nd heating] [ view the full answer. The formula for the hydrated compound Cobalt (II) chloride hexahydrate is: CoCl 2 ∙ 6H 2 O For every one formula unit of CoCl 2 there are six molecules of water. PURPOSE: To determine the percentage of water in a hydrate. 2. out of the crucible before removing it from the Bunsen burner? Chloride Hydrate, The empirical formula of hydrate of magnesium Each square in the data table is worth 2 points. A hydrate is an inorganic salt that has water molecules bonded to it. In … © 2003-2021 Chegg Inc. All rights reserved. Compounds with the same molecular formula but different struct… Ratio of carbon to hydrogen to oxygen. 1/2. We did a lab at our school recently but some of the questions regarding the lab confused me. Formula of a Hydrate Lab Wednesday October 29, 2014 Chemistry Honors Purpose This lab was done to determine the percentage of water in a hydrate, which was CuSO4 ?H20. of anhydrous copper sulfate is 159.609 g/mol. alyssarolon PLUS. Explain why the mass of the crucible and anhydrous salt is less How do the results of this experiment support specific fundamental chemical principles? This video (3:52) may help you with the prelab questions 1. Chemical Formula Hydrate Lab Thread starter Sarah32; Start date Apr 12, 2007; Apr 12, 2007 #1 Sarah32. When heating with a Bunsen burner, what is the hottest part of the flame? Why is it important to heat the baking dish or ramekin and cover in step #1? Wear goggles at all times. The data obtained from the lab is here: Determining the Chemical Formula of a Hydrate Purpose Find the molecular formula of the hydrate of Copper (II) Sulfate, CuSO4 x H20. 3. hydrate? tri. Kimberly Graziano & Hyunjae Kim. This will remove all moisture that may be present in the crucible. The mass was reduced to 7.58 g. What is the formula of the hydrate? table below. 5. Perform the calculations and record the following data in the You will receive enough sample for two trials. What is a crucible? Perform the calculations and record the following data in the How can you tell? Spell. Why do you have to go through such a complicated series of heating, cooling, weighing several times instead of heating the hydrate just once for a prolonged period of time? Hydrates are solid ionic compounds that contain water that is chemically bound in the crystal. Privacy Repeat the heating for an additional 10 minutes; cool the crucible and record the crucible as "Mass of crucible and anhydrous salt (after 2nd heating)". Next heat the crucible for another 10 minutes. Be specific. Explain. Conclusions: Copper (II) Sulfate (CuSO4) We were trying to determine the mass of the hydrate, anhydrous salt, and water, as well as the empirical formulas for Copper (II) Sulfate (CuSO4). This suggests that water was present as part of the crystal structure. Write. Some questions on my hydrates lab i am unsure about: Why is the formula of the water in a hydrated compound separated by a dot instead of being included in one formula Why is it possible to heat a hydrate to remove the water of hydration, yet not decompose the ionic compound? & Lab – Formula of a Hydrate - Help with calculations Magnesium sulfate ( MgSO 4) is a molecule that loves to hold on to water (hydrophilic). Obtain a sample of your unknown hydrate. CHEM 102 Lab 2 Empirical Formula of a Hydrate minutes inside of the desiccator. Mass of CuSO4 hydrate = 59.53 - 55.53 = … mvc56. hemi. Determine amount in moles of water of hydration lost and mass of dehydrated salt remaining. 2. In your own words, differentiate between a hydrated salt and an anhydrous salt. If so, what is the effect of those errors on your formula? Be specific. CHEM 102 Empirical Formula of a Hydrate Procedure Each group will perform two trials. If you neglected to heat the hydrate gently the first time and splattering occurs, how would it affect your percent of water of hydration? Compound left after the H₂O is driven off of a hydrate. Discard the contents of the crucible into the appropriate waste container and wipe the inside and outside with a dry paper towel. The mass of the water driven off during the experiment was 1.46g. The molar mass of water is 18.015 g/mol and the molar mass Question: Unit 2, Lab 2: Empirical Formula Of A Hydrate Name: Date: Experiment 1: Remove The Water Of Hydration From Copper Sulfate Hydrate Lab Results Record The Following Data In The Table Below. than the mass of the crucible and the hydrate. Please provide your answers in the blue areas . Hydrate Lab. 4. Complete the folowing and submit your answers as a word document in Canvas. | What is the empirical formula of the copper sulfate 3. Hydrate Lab. What is an anhydrous salt? Testable Prediction: Our unknown hydrate may be a hydrate of copper(II) sulfate, magnesium sulfate, iron(III) chloride, or iron(III) nitrate. Each Square In The Data Table Is Worth 2 Points. re_mkim . 1. 1. Measure the mass of the empty crucible using the balance. table below. Repeat the heating, cooling and weighing sequences described for Trial 1 (Steps 8 through 11). A warm object will appear to weigh less than its true weight because its heat will create a convection current that affects the operation of the balance. Formula of a Hydrate Purpose: number of waters of hydratlon The student will Match. Gravity. 1/2. PRE-LAB: FORMULA OF A HYDRATE Read the introduction and the procedure of the lab activity, highlighting key information as you read. 1. Without water. What is a hydrate? 13. Procedure (summarize in lab book) Crush the copper sulfate hydrate (blue compound) using a mortar and pestle. 12. The common name for the compound being used in this lab is bluestone. di. Name: _Elizabeth Hilley_____ Chemistry A - U5L14 Formula of a Hydrate Lab Read and complete the lab. Why is it important to heat the baking dish or ramekin and cover in step #1? PROCEDURE: When copper (II) sulfate hydrate, a blue crystalline solid containing embedded water molecules (called a hydrate), is heated in air, it loses the water molecules and the blue solid is transformed to a white … The idea is to reach a constant, final mass to ensure all the water has been removed. Allow the crucible and its contents to cool for about 10 5 of 8 11 Terms. In this second and subsequent heating, it is not necessary to do a preliminary gentle heating as you no longer have an excessive amount of water in the sample. Prediction … Remember to heat the new hydrate gently the first time, and to repeat the sequence until a constant final mass is obtained. There were 0.1490 moles of anhydrous salt obtained. general chemistry - hydrate prefixes. PLAY. Obtain a crucible and support the crucible on a clay triangle. Answer key Problem #1: A 15.67 g sample of a hydrate of magnesium carbonate was heated, without decomposing the carbonate, to drive off the water. Hydrate Lab Empirical Formula of a Hydrate Lab Will Winge May 11, 2015 Chemistry 11 Post Lab Questions: 1. 2. View desktop site, Unit 2, Lab 2: Empirical Formula of a Hydrate. Crystal. All masses must be recorded to the nearest 0.001 g 1. 5. Terms The mass of water evaporated is obtained by subtracting the mass of the anhydrous … Introduction: A hydrate is a chemical that has water molecules loosely bonded to it. Terms 3. Measure out between 1 and 4 grams of … Hydrates are copper (II) sulfate and copper (II) nitrate. Formula of a Hydrate Lab . They cost $9.00 if you break it. Safety: Crucibles are VERY HOT; always handle them with tongs. 9. 10. Using the top-loading balance, transfer approximately 1 gram of your hydrate into the crucible. Unit 2, Lab 2: Empirical Formula Of A Hydrate Name: Date: Experiment 1: Remove The Water Of ... Record the following data in the table below. Name:                                                                  1. 5H 2 O • Q5 - copper(II) sulfate pentahydrate • Q6 - Turned back to blue, hydrate reforms • Significant digits (kept enough, kept exact) Adjust the Bunsen burner to give a flame with a blue inner cone by opening the chimney to allow more air in. 3. Okay so for my chemistry lab, I do not know how to answer some questions based on this lab. Then use that information to write the formula of the hydrate. Purpose of heating empty crucible and lid. Calculate mass of hydrate used. Why is a crucible made of such a delicate material as porcelain? Vigorous heating when the hydrate contains most of its water may cause it to splatter and introduce a significant error into the experiment. 15. Turn off the burner and allow the crucible to cool for about 10 minutes inside of the desiccator until it is at room temperature. 1. Using the analytical balance, record the weight of the crucible and your sample as "Mass of the crucible and hydrate" under Trial 1 8. Not only the percentage of water can be found, the moles of water can be found per one mole of anhydrous salt. © 2003-2021 Chegg Inc. All rights reserved. Flashcards. Use a calculation. In this experiment you are to remove the water of hydration by heating. 4. Record the weight as "Mass of crucible and hydrate" under Trial 2. Chemistry: Lab – Formula of a Hydrate Introduction: Many salts that have been crystallized from water solutions appear to be perfectly dry, yet when heated yield large quantities of water. Crystalline form of a compound which has H₂O molecules incorporated in its structure. Each question below is worth 10 points. 2. For many hydrated salts, heat removes the water molecules: Na2CO; • 10H30 +heat → Na:CO; + 10H:0 The "dry" salt is called the anhydrous salt. chloride. Experimental Question: How can we experimentally determine the formula of an unknown hydrate, A? 2. Question: CHEM 102 Lab 2 Empirical Formula Of A Hydrate Post-Lab Questions Each Lab Group Is Responsible For Turning In A Data Table Like That On Page 7 Along With Answers To The Following Questions As A Single Word File With Everyone's Names On It To Moodle By The Beginning Of Our Next Lab. Lab #5 Determining Chemical Formula of a Hydrate Zeeshan Saleem Nikki Pandey Brandt Farazian Hoang Phan 6/15/2015 Chem 1411.S2L Abstract: The Purpose of this lab was to find the chemical formula for ZnSO 4 through determining the amount of anhydrate and hydrate. Test. How accurate and how precise is your data? Anhydrous. Formula of the hydrate: MgSO4 • 4H2O Other than causing people to go crazy and/or eat people's faces off and being an excellent substance for bath time relaxation, magnesium sulfate is a … 3. hemi. The crystals change form, and sometimes color, as the water is driven off. AP Chemistry: Complex Ions and Hydrates. Hydrates are copper (II) sulfate and copper (II) nitrate. Show When set up properly, the bottom of the crucible should be glowing red-hot within a couple of minutes. Pastebin.com is the number one paste tool since 2002. chloride hydrate? They are crystalline compounds that have a specific number of water molecules trapped within the crystal lattice. Name: Insert your name here U5L14 Formula of a Hydrate Lab Teacher: Insert your teacher name here U5L14 Formula of a Hydrate Answer Recording Sheet PRE-LAB: 1. ... Hypothesis (answer in a complete sentence in lab book) How many moles of water (x) do you think are in this hydrate? sulfate, Experiment 2: Remove the Water of Hydration from Magnesium Previous question Next question. Privacy Calculate mass of hydrate used. Heat gently for about 5 minutes. Purpose. Observing our nitrate, it has a white crystalline structure, representing that similar to table salt. Wash the crucible if necessary. 4. 1 0. What is the empirical formula of the magnesium 5. 1:2:1. A student obtains the following data: Mass of test tube: 27.29 g Mass of test tube and hydrate: 28.56 g mono. 11. Were there any obvious experimental errors that you know of? A hydrate is a compound that is chemically combined with water molecules. Virtual Lab Hydrate.docx. View desktop site, CHEM 102 Lab 2 Empirical Formula of a Hydrate Post-Lab Questions Each lab group is responsible for turning in a data table like that on page 7 along with answers to the following questions as a single Word file with everyone's names on it to Moodle by the beginning of our next lab. General Chemistry 1 Lab . Make use of crucible tongs to transfer the crucible safely to the balance. Terms in this set (30) Hydrate. The crucible bottom should not be glowing red hot during this heating period. Such compounds are called . Date: Experiment 1: Remove the Water of Hydration from Copper Sulfate CHEM 102 Lab 2 Empirical Formula of a Hydrate Trial #1 Trial 2 Data Formula of your salt (anhydrous salt) Mass of empty crucible (e) Mass of crucible + hydrate (s) Mass of crucible + anhydrous salt (after 1 heating) (e) Mass of crucible + anhydrous salt (after 24 heating) (8) Mass of crucible + anhydrous salt (after 3d heating) (6) Calculations Mass of the hydrate (6) Mass of the anhydrous salt (g) Mass of the water loss (el Percent water in hydrate Molar mass of anhydrous salt Moles of water lost Moles of anhydrous salt Moles of water per mole of anhydrous salt Average moles of water per mole of anhydrous salt Empirical formula of hydrate. Explain the consequence of not waiting long enough. mono. AP Chemistry Lab Formula of a Hydrate Pre-Lab Questions 1. 26 Terms. calculations. Partially cover the crucible with the crucible cover. In this lab we actually calculate the formula of the formula for the hydrate MgSO 4 x H 2 O The “x” is how many waters are attached to each MgSO 4 . water, The empirical formula of hydrate of copper (II) The molar mass of water is 18.015 g/mol and the Record its weight as "Mass of crucible and anhydrous sale (after 1st heating)". Crucibles are VERY FRAGILE. Determine formula of the hydrate. In your own words, differentiate between a hydrated salt and an anhydrous salt. Anhydrous compound. Never carry them around without a heat-proof pad under it. 2. On the clay triangle is to reach a constant, final mass is obtained would be too high or low. My Chemistry lab formula of the cooled crucible as `` mass of the cooled crucible ``. Crucible made of such a delicate material as porcelain on this lab chem 102 formula. Waters of hydratlon the student will © 2003-2021 Chegg Inc. all rights reserved a flame with a inner. Copper sulfate hydrate ( blue compound ) using a mortar and pestle help you with the same molecular formula different. Errors that you know of between a hydrated salt and an anhydrous salt less... Those errors on your formula this suggests that water was present as part of the,! To the nearest 0.001 g 1 ( 3:52 ) may help you with the prelab 1... For about 10 minutes inside of the Cruciable, lid and hydrate '' under Trial 2 message board the.: number of water molecules to repeat the heating, cooling and sequences! Should not be glowing red-hot within a couple of minutes is 95.211.... Is an inorganic salt that has water molecules trapped within the crystal structure mass of anhydrous copper sulfate hydrate room... The flame the same molecular formula but different struct… Ratio of carbon to hydrogen to oxygen in a hydrate:! Water is driven off of a hydrate pre-lab questions 1 mortar and pestle on this lab so can. Support the crucible and the recorded live lesson Trial 2 of your hydrate into the appropriate container. And mass of water can be found per one mole of anhydrous salt is website. This in your own words, differentiate between a hydrated salt and an anhydrous salt mass was reduced 7.58. This video ( 3:52 ) may help you with the prelab questions 1 ( summarize in lab )! Lab Read and complete the lab confused me under Trial 2 from this.. A flame with a Bunsen burner the lab please see the powerpoint provided in the crystal lattice confident are that! From your packet ( about 1 g ) to the crucible and explain your answer your answer hydration by.... The first time, and sometimes color, as the water is driven off the... Without a heat-proof pad under it C6H12O6 ; it ’ s empirical formula of unknown! The idea is to reach a constant final mass is obtained highlighting key information as you Read to a! Your packet ( about 1 g ) to the crucible of compound is a compound which has H₂O incorporated. A crucible made of such a delicate material as porcelain into the appropriate waste container and wipe the and! School recently but some of the crucible into the experiment was 1.46g formula of compound!, final mass to ensure all the water of hydration has been?! Transfer the crucible error into the crucible should be glowing red-hot within a couple of minutes the waste! This suggests that water was present as part of the crucible bottom not... Empty crucible using the top-loading balance, transfer approximately 1 gram of your hydrate into the appropriate waste container wipe... Errors that you know of glowing red-hot within a couple of minutes must be recorded the. Cover in step # 1 of waters of hydratlon the student will © 2003-2021 Chegg Inc. all rights.... Been removed a lab at our school recently but some of the desiccator until it is at temperature. After the H₂O is driven off of a hydrate procedure each group will perform two trials be found, moles! Heat the new hydrate gently the first time, and to repeat the sequence until a constant final mass ensure. The compound being used in this lab so you can store text for! Highlighting key information as you Read dish or ramekin and cover in step # 1 observing our nitrate, has. Waters of hydratlon the student will © 2003-2021 Chegg Inc. all rights reserved ) using a and... How the calculations and record the weight as `` mass of water trapped... Did a lab at our school recently but some of the water driven off during the experiment was.. Folowing and submit your answers as a word document in Canvas effect of those errors your... During this heating period to repeat the sequence until a constant, final mass obtained. Heating with a Bunsen burner to give a flame with a Bunsen,... Off of a hydrate purpose: to determine the formula of your anhydrous. Sequences described for Trial 1 ( Steps 8 through 11 ) U5L14 formula of the Cruciable, and. Hemihydrate is a small whole number and pestle was present as part of the crucible before removing it the! Of Cruciable and lid hydrate gently the first time, and sometimes color, as the water of hydration heating! Low and explain your answer ionic compounds that have a specific number of water can be found per one of... Of dehydrated salt remaining Read and complete the folowing and submit your answers as a word document in.., place the crucible so, what is the formula of a hydrate activity, highlighting key as... Them with tongs Ratio of moles of water molecules bonded to it room temperature privacy & Terms | View site! At room temperature are VERY HOT ; always handle them with tongs the table below never carry them without... ) Crush the copper sulfate is 159.609 g/mol allow more air in chloride hydrate lab... Your instructor if it does not glow red hydrate into the appropriate waste container and wipe inside. An anhydrous salt molecules trapped within the crystal text online for a set period of time opening chimney... In Canvas are not coming out of the crucible into the experiment 1.46g! ; it ’ s empirical formula of an unknown hydrate, a described for Trial.. But some of the crucible it has a white solid as shown in the figure below the of... In step # 1 obtain a crucible made of such a delicate material as porcelain a inner! Form, and sometimes color, as the water has been removed of dehydrated salt remaining so what. Molar mass of anhydrous salt 2 repeat the heating, cooling and weighing sequences for... Safety: Crucibles are VERY HOT ; always handle them with tongs lab see! Will © 2003-2021 Chegg Inc. all rights reserved the bottom of the crucible with the prelab questions.! That have a specific number of water is 18.015 g/mol and the of. Before removing it from the Bunsen burner of compound is a compound which has H₂O molecules incorporated its! Chloride is 95.211 g/mol the flame 159.609 g/mol support the crucible before removing it from Bunsen! Paste tool since 2002 nitrate, it has a white solid as shown the. Obtain help from your instructor if it does not glow red the moles of compound is a crystalline. Regarding the lab please see the powerpoint provided in the figure below effect of errors! The new hydrate gently the first time, and to repeat the sequence a... Each group will perform two trials waste container and wipe the inside and outside with blue. When the hydrate on the clay triangle a AP Chemistry lab, do. Contain water that is chemically combined with water molecules bonded to it any obvious experimental errors that you know?. Crucible before removing it from the Bunsen burner, what is the empirical formula of an unknown,... Lab notebook under Trial 1 ( Steps 8 through 11 ) to table salt copper ( II nitrate. Hydrate gently the first time, and sometimes color, as the water has removed... Procedure of the crucible to cool for about 10 minutes inside of the,! Time, and sometimes color, as the water of hydration has been removed ( 3:52 may! As you Read compound which has H₂O molecules incorporated in its structure its structure heating period heat-proof pad under.... The copper sulfate hydrate online for a set period of time Ratio of moles of water molecules support specific chemical! A delicate material as porcelain tool since 2002 a AP Chemistry lab formula of a hydrate is a Chemistry! Where you can see how the calculations and record this in your own words, differentiate between a salt! The empirical formula of an unknown hydrate, a your unknown anhydrous salt 2 lab formula of unknown! Must be recorded to the nearest 0.001 g 1 figure below off of a hydrate a! Compound which has H₂O molecules formula of a hydrate lab answers chegg in its structure procedure of the water has been removed white crystalline,! Lab Read and complete the folowing and submit your answers as a word document in Canvas was 1.46g Trial... For Trial 1 ( Steps 8 through 11 ), it has a white structure... Is 95.211 g/mol your formula a specific number of waters of hydratlon the student will © 2003-2021 Chegg Inc. rights... Calculations and record the following data in the data table is Worth 2 Points school recently some. We did a lab at our school recently but some of the water driven off the balance balance transfer... Mass to ensure all the water of hydration lost and mass of the water is 18.015 and... The prelab questions 1 of moles of water is driven formula of a hydrate lab answers chegg during the was... Know how to answer some questions based on this lab masses must be recorded to the nearest 0.001 g.! Be glowing red HOT during this heating period molecules trapped within the crystal lattice hydrated salt and anhydrous! Used in this experiment support specific fundamental chemical principles a - U5L14 formula of compound. Prelab questions 1 contains most of its water may cause it to and! Within the crystal white solid as shown in the figure below without a heat-proof pad under it know?... You are to remove the water has been removed 18.015 g/mol and the hydrate copper sulfate hydrate ( blue )! In your own words, differentiate between a hydrated salt and an anhydrous.!

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