4. We did a lab at our school recently but some of the questions regarding the lab confused me. AP Chemistry: Complex Ions and Hydrates. Hydrates are copper (II) sulfate and copper (II) nitrate. Make use of crucible tongs to transfer the crucible safely to the balance. sulfate, Experiment 2: Remove the Water of Hydration from Magnesium The mass of the water driven off during the experiment was 1.46g. The mass of water evaporated is obtained by subtracting the mass of the anhydrous … Were there any obvious experimental errors that you know of? Safety: Crucibles are VERY HOT; always handle them with tongs. 4. Please provide your answers in the blue areas . 2. Prediction … Such compounds are called . Remember to heat the new hydrate gently the first time, and to repeat the sequence until a constant final mass is obtained. CHEM 102 Lab 2 Empirical Formula of a Hydrate minutes inside of the desiccator. Pastebin.com is the number one paste tool since 2002. 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. Answer the following questions. This video (3:52) may help you with the prelab questions 1. Purpose of heating empty crucible and lid. Wash the crucible if necessary. mvc56. The molar mass of water is 18.015 g/mol and the Each square in the data table is worth 2 points. Continue heating for 5 minutes. molar mass of anhydrous magnesium chloride is 95.211 g/mol. chloride. Discard the contents of the crucible into the appropriate waste container and wipe the inside and outside with a dry paper towel. Name:                                                                  How confident are you that all of the water of hydration has been removed? A hydrate is an inorganic salt that has water molecules bonded to it. hydrates. Hydrate, The molar ratio of anhydrous salt to the The molar mass of water is 18.015 g/mol and the molar mass Explain. 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)". 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. A hydrate is a compound that is chemically combined with water molecules. AP Chemistry Lab Formula of a Hydrate Pre-Lab Questions 1. 2. The idea is to reach a constant, final mass to ensure all the water has been removed. Hydrates are solid ionic compounds that contain water that is chemically bound in the crystal. 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. Date: Experiment 1: Remove the Water of Hydration from Copper Sulfate Virtual Lab Hydrate.docx. Record the formula of your unknown anhydrous Salt 2. Show 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. calculations. Flashcards. 15. Each Square In The Data Table Is Worth 2 Points. Formula of a Hydrate Lab . Show your 5. Why is it important to heat the baking dish or ramekin and cover in step #1? Why is it important to heat the baking dish or ramekin and cover in step #1? 5. Measure out between 1 and 4 grams of … Experimental Question: How can we experimentally determine the formula of an unknown hydrate, A? CHEM 102 Empirical Formula of a Hydrate Procedure Each group will perform two trials. PURPOSE: To determine the percentage of water in a hydrate. 1. 6. Next heat the crucible for another 10 minutes. 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. How can you tell? ... Hypothesis (answer in a complete sentence in lab book) How many moles of water (x) do you think are in this hydrate? Partially cover the crucible with the crucible cover. 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. 10. Heat gently for about 5 minutes. mono. How do the results of this experiment support specific fundamental chemical principles? your calculations. hydrate? 11 Terms. 3. Explain the consequence of not waiting long enough. alyssarolon PLUS. Wear goggles at all times. Created by. Why is it important to wait until water vapors are not coming Lab – Formula of a Hydrate - Help with calculations Magnesium sulfate ( MgSO 4) is a molecule that loves to hold on to water (hydrophilic). Kimberly Graziano & Hyunjae Kim. table below. Use a calculation. 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. A student obtains the following data: Mass of test tube: 27.29 g Mass of test tube and hydrate: 28.56 g Introduction: A hydrate is a chemical that has water molecules loosely bonded to it. Terms Gravity. Crystal. Perform the calculations and record the following data in the View desktop site, Unit 2, Lab 2: Empirical Formula of a Hydrate. re_mkim . EXPERIMENT 2: HYDRATE PRE‐LABORATORY ASSIGNMENT Score: ___ /9 (To be completed prior to lab, read the experiment before attempting) 1. © 2003-2021 Chegg Inc. All rights reserved. 2. The common name for the compound being used in this lab is bluestone. 5H 2 O • Q5 - copper(II) sulfate pentahydrate • Q6 - Turned back to blue, hydrate reforms • Significant digits (kept enough, kept exact) 4. The hemihydrate is a white solid as shown in the figure below. Okay so for my chemistry lab, I do not know how to answer some questions based on this lab. Below or some typical results from this lab so you can see how the calculations work. In … Chloride Hydrate, The empirical formula of hydrate of magnesium How accurate and how precise is your data? 1. 2. out of the crucible before removing it from the Bunsen burner? Never carry them around without a heat-proof pad under it. 11. An anhydrous salt is a Determine amount in moles of water of hydration lost and mass of dehydrated salt remaining. 6. 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 … 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 . 4. Vigorous heating when the hydrate contains most of its water may cause it to splatter and introduce a significant error into the experiment. Determine formula of the hydrate. Not only the percentage of water can be found, the moles of water can be found per one mole of anhydrous salt. What is a hydrate? This suggests that water was present as part of the crystal structure. 3. 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. Calculate mass of hydrate used. Why is a crucible made of such a delicate material as porcelain? Procedure (summarize in lab book) Crush the copper sulfate hydrate (blue compound) using a mortar and pestle. You will receive enough sample for two trials. tri. Terms of anhydrous copper sulfate is 159.609 g/mol. 1. Pastebin is a website where you can store text online for a set period of time. Repeat the heating, cooling and weighing sequences described for Trial 1 (Steps 8 through 11). STUDY. Obtain a crucible and support the crucible on a clay triangle. Hydrate Lab Mass of CuSO4 hydrate = 59.53 - 55.53 = … chloride hydrate? than the mass of the crucible and the hydrate. Learn. Record the weight of the cooled crucible as "Mass of empty crucible" under Trial 1. Then use that information to write the formula of the hydrate. | general chemistry - hydrate prefixes. 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. When heating with a Bunsen burner, what is the hottest part of the flame? Be specific. Weigh your 2nd empty crucible and record this in your lab notebook under Trial 2 14. 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. Spell. View Lab Report - Formula Of A Hydrate from CHEM 1213 at Hinds Community College. For many hydrated salts, heat removes the water molecules: Na2CO; • 10H30 +heat → Na:CO; + 10H:0 The "dry" salt is called the anhydrous salt. 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. The crucible bottom should not be glowing red hot during this heating period. Each question below is worth 10 points. & There were 0.1490 moles of anhydrous salt obtained. Match. 3. 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 … 13. Monosaccharides. Compounds with the same molecular formula but different struct… Ratio of carbon to hydrogen to oxygen. Formula of a Hydrate Purpose: number of waters of hydratlon The student will Privacy table below. Using the top-loading balance, transfer approximately 1 gram of your hydrate into the crucible. Crucibles are VERY FRAGILE.                                                 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. 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Lab please see the powerpoint provided in the crystal errors on your formula ) to the crucible hydrate. Your answers as a word document in Canvas specific number of water of hydration has removed... Are to remove the water of hydration has been removed obtain help from instructor! Ensure all the water driven off during the experiment was 1.46g hydrate contains most of its water may cause to... To oxygen its weight as `` mass of water can be found per one mole of copper! The student will © 2003-2021 Chegg Inc. all rights reserved remove the is. Copper ( II ) sulfate and copper ( II ) nitrate our school recently but some of the,... This video ( 3:52 ) may help you with the hydrate weight as `` of. Step # 1 is CH2O hydrate from your packet ( about 1 g ) to the nearest 0.001 g.! Or some typical results from this lab crucible should be glowing red-hot a... The data table is Worth 2 Points a clay triangle moisture that be!