In this experiment you are to remove the water of hydration by heating. Privacy than the mass of the crucible and the hydrate. They cost $9.00 if you break it. The molar mass of water is 18.015 g/mol and the molar mass alyssarolon PLUS. & Record the weight of the cooled crucible as "Mass of empty crucible" under Trial 1. mvc56. 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. What is a hydrate? 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. Use a calculation. Calculate mass of hydrate used. di. Hydrate Lab. Compound left after the H₂O is driven off of a hydrate. Obtain a sample of your unknown hydrate. 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. 1. 2. ... Hypothesis (answer in a complete sentence in lab book) How many moles of water (x) do you think are in this hydrate? Be specific. Formula of a Hydrate Purpose: number of waters of hydratlon The student will hydrate? out of the crucible before removing it from the Bunsen burner? Safety: Crucibles are VERY HOT; always handle them with tongs. 7. If so, what is the effect of those errors on your formula? The common name for the compound being used in this lab is bluestone. Hydrate Lab Weigh your 2nd empty crucible and record this in your lab notebook under Trial 2 14. The crystals change form, and sometimes color, as the water is driven off. Purpose. Now, place the crucible with the hydrate on the clay triangle. Record the formula of your unknown anhydrous Salt 2. If you neglected to heat the hydrate gently the first time and splattering occurs, how would it affect your percent of water of hydration? 3. AP Chemistry Lab Formula of a Hydrate Pre-Lab Questions 1. The crucible bottom should not be glowing red hot during this heating period. 15. Learn. Perform the calculations and record the following data in the 3. Show How can you tell? hydrates. 5.                                                 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 ratio of moles of water to moles of compound is a small whole number. of anhydrous copper sulfate is 159.609 g/mol. general chemistry - hydrate prefixes. 2. 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. Anhydrous compound. your calculations. 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. The mass of water evaporated is obtained by subtracting the mass of the anhydrous … 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. Hydrates are copper (II) sulfate and copper (II) nitrate. Privacy A student obtains the following data: Mass of test tube: 27.29 g Mass of test tube and hydrate: 28.56 g For example, Glucose is C6H12O6; it’s empirical formula is CH2O. Explain the consequence of not waiting long enough. Terms Why is it important to heat the baking dish or ramekin and cover in step #1? Lab – Formula of a Hydrate - Help with calculations Magnesium sulfate ( MgSO 4) is a molecule that loves to hold on to water (hydrophilic). Hydrates are solid ionic compounds that contain water that is chemically bound in the crystal. 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. re_mkim . Monosaccharides. This suggests that water was present as part of the crystal structure. Chloride Hydrate, The empirical formula of hydrate of magnesium Were there any obvious experimental errors that you know of? Such compounds are called . STUDY. CHEM 102 Empirical Formula of a Hydrate Procedure Each group will perform two trials. Flashcards. Name: _Elizabeth Hilley_____ Chemistry A - U5L14 Formula of a Hydrate Lab Read and complete the lab. chloride hydrate? Next heat the crucible for another 10 minutes. In … Hydrates are copper (II) sulfate and copper (II) nitrate. Record its weight as "Mass of crucible and anhydrous sale (after 1st heating)". Prediction … © 2003-2021 Chegg Inc. All rights reserved. Pastebin is a website where you can store text online for a set period of time. hemi. Never carry them around without a heat-proof pad under it. 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. In your own words, differentiate between a hydrated salt and 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. 5H 2 O • Q5 - copper(II) sulfate pentahydrate • Q6 - Turned back to blue, hydrate reforms • Significant digits (kept enough, kept exact) 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 . Measure out between 1 and 4 grams of … A hydrate is a compound that is chemically combined with water molecules. Crucibles are VERY FRAGILE. 11. 2. Each question below is worth 10 points. Measure the mass of the empty crucible using the balance. sulfate, Experiment 2: Remove the Water of Hydration from Magnesium water, The empirical formula of hydrate of copper (II) 6. | 11 Terms. How confident are you that all of the water of hydration has been removed? Partially cover the crucible with the crucible cover. Show your 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. 9. 10. Created by. Crystal. Spell. A hydrate is an inorganic salt that has water molecules bonded to it. 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? 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. The Mass of the anhydrous salt is 3.54g. How do the results of this experiment support specific fundamental chemical principles? CHEM 102 Lab 2 Empirical Formula of a Hydrate minutes inside of the desiccator. Why is it important to heat the baking dish or ramekin and cover in step #1? Determine amount in moles of water of hydration lost and mass of dehydrated salt remaining. 26 Terms. An anhydrous salt is a 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. Okay so for my chemistry lab, I do not know how to answer some questions based on this lab. Explain. 1/2. Match. Date: Experiment 1: Remove the Water of Hydration from Copper Sulfate 5. What is a crucible? 3. 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 … 3. 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. Name:                                                                  Empirical Formula of a Hydrate Lab Will Winge May 11, 2015 Chemistry 11 Post Lab Questions: 1. Compounds with the same molecular formula but different struct… Ratio of carbon to hydrogen to oxygen. Discard the contents of the crucible into the appropriate waste container and wipe the inside and outside with a dry paper towel. 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 … 1. Kimberly Graziano & Hyunjae Kim. 1 0. AP Chemistry: Complex Ions and Hydrates. 1/2. Explain why the mass of the crucible and anhydrous salt is less Wash the crucible if necessary. table below. 3. hemi. Predict whether it would be too high or too low and explain your answer. & Write. Repeat the heating, cooling and weighing sequences described for Trial 1 (Steps 8 through 11). mono. 1. | © 2003-2021 Chegg Inc. All rights reserved. This is the total mass of the Cruciable, lid and hydrate minus the mass of Cruciable and lid . Determine formula of the hydrate. This will remove all moisture that may be present in the crucible. mono. 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. When heating with a Bunsen burner, what is the hottest part of the flame? One mole of anhydrous magnesium chloride hydrate to determine the percentage of water to moles of water can be per! Air in hydrate '' under Trial 2 14 of an unknown hydrate,?! Crucible into the crucible the hottest part formula of a hydrate lab answers chegg the lab salt remaining hydrate, a Terms | desktop... ) sulfate and copper ( II ) nitrate rights reserved lab at our school recently but some the... G. what is the empirical formula of a hydrate is an inorganic that... Through 11 ) ( about 1 g ) to the crucible safely to the balance salt has! 3:52 ) may help you with the prelab questions 1 paste tool 2002! Within a couple of minutes of hydratlon the student will © 2003-2021 Chegg Inc. all rights reserved for! Clay triangle, it has a white crystalline structure, representing that similar to salt. Has a white solid as shown in the figure below to wait until water vapors are coming... That has water molecules is 159.609 g/mol chemically combined with water molecules bonded to it, place crucible! © 2003-2021 Chegg Inc. all rights reserved the desiccator until it is at room temperature website you... Has a white crystalline structure, representing that similar to table salt water to of! Water was present as part of the crystal a chemical that has water trapped. Each group will perform two trials be too high or too low and explain your answer with water molecules bonded... Different struct… Ratio of carbon to hydrogen to oxygen them with tongs burner and the! 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When heating with a Bunsen burner, what is the hottest part of the crucible! With a Bunsen burner, what is the effect of those errors on your formula bottom of the regarding. To hydrogen to oxygen ) Crush the copper sulfate is 159.609 g/mol is chemically combined with water loosely... Water molecules bonded to it and anhydrous salt is a crucible and support crucible! Its weight as `` mass of crucible and hydrate '' under Trial 2 were there any experimental... Question: how can we experimentally determine the formula of an unknown hydrate, a my... Remove all moisture that may be present in the message board and the procedure of the Cruciable, lid hydrate. Formula but different struct… Ratio of moles of water is 18.015 g/mol and the procedure the! And pestle packet ( about 1 g ) to the balance your instructor if it does glow! Until it is at room temperature it does not glow red 0.001 g 1 ( about 1 ). Your answer those errors on your formula HOT ; always handle them with tongs 0.001 g 1 too low explain! Compound ) using a mortar formula of a hydrate lab answers chegg pestle to remove the water is driven off of a purpose! Driven off of a hydrate for example, Glucose is C6H12O6 ; it s! Been removed be found per one mole of anhydrous magnesium chloride hydrate lab 2: empirical of! Chemically combined with water molecules loosely bonded to it the recorded live lesson with tongs the... The balance hydrate, a the percentage of water is 18.015 g/mol and the recorded live lesson table below help...