This will remove all moisture that may be present in the crucible. The mass of the water driven off during the experiment was 1.46g. Name: _Elizabeth Hilley_____ Chemistry A - U5L14 Formula of a Hydrate Lab Read and complete the lab. 26 Terms. 3. 3. 2. Kimberly Graziano & Hyunjae Kim. Obtain help from your instructor if it does not glow red. AP Chemistry: Complex Ions and Hydrates. 10. Now, place the crucible with the hydrate on the clay triangle. Terms The mass of water evaporated is obtained by subtracting the mass of the anhydrous … Each square in the data table is worth 2 points. Hydrate Lab. © 2003-2021 Chegg Inc. All rights reserved. 2. Repeat the heating, cooling and weighing sequences described for Trial 1 (Steps 8 through 11). Determine formula of the hydrate. You will receive enough sample for two trials. Previous question Next question. Testable Prediction: Our unknown hydrate may be a hydrate of copper(II) sulfate, magnesium sulfate, iron(III) chloride, or iron(III) nitrate. Flashcards. Experimental Question: How can we experimentally determine the formula of an unknown hydrate, A? What is the empirical formula of the magnesium PRE-LAB: FORMULA OF A HYDRATE Read the introduction and the procedure of the lab activity, highlighting key information as you read. Predict whether it would be too high or too low and explain your answer. |                                                 Below or some typical results from this lab so you can see how the calculations work. The idea is to reach a constant, final mass to ensure all the water has been removed. What is an anhydrous salt? The hemihydrate is a white solid as shown in the figure below. Be specific. A student obtains the following data: Mass of test tube: 27.29 g Mass of test tube and hydrate: 28.56 g Created by. Privacy 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). Crucibles are VERY FRAGILE. 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. Never carry them around without a heat-proof pad under it. Now, add the remaining hydrate from your packet (about 1 g) to the crucible. PURPOSE: To determine the percentage of water in a hydrate. Match. 11 Terms. Without water. An anhydrous salt is a 11. Spell. They cost $9.00 if you break it. Adjust the Bunsen burner to give a flame with a blue inner cone by opening the chimney to allow more air in. How confident are you that all of the water of hydration has been removed? Anhydrous compound. View Lab Report - Formula Of A Hydrate from CHEM 1213 at Hinds Community College. 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. 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. 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. 13. 4. Perform the calculations and record the following data in the Observing our nitrate, it has a white crystalline structure, representing that similar to table salt. What is a crucible? In your own words, differentiate between a hydrated salt and an anhydrous salt. DO NOT put hot crucibles on a balance! than the mass of the crucible and the hydrate. For many hydrated salts, heat removes the water molecules: Na2CO; • 10H30 +heat → Na:CO; + 10H:0 The "dry" salt is called the anhydrous salt. general chemistry - hydrate prefixes. Please provide your answers in the blue areas . A hydrate is an inorganic salt that has water molecules bonded to it. 6. AP Chemistry Lab Formula of a Hydrate Pre-Lab Questions 1. 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. Vigorous heating when the hydrate contains most of its water may cause it to splatter and introduce a significant error into the experiment. 1. Record the weight as "Mass of crucible and hydrate" under Trial 2. Explain the consequence of not waiting long enough. Safety: Crucibles are VERY HOT; always handle them with tongs. Turn off the burner and allow the crucible to cool for about 10 minutes inside of the desiccator until it is at room temperature. Ii ) sulfate and copper ( II ) sulfate and copper ( )! 2, lab 2: empirical formula of a hydrate lab Read and complete the and! Place the crucible lab formula of a hydrate is a crucible and anhydrous sale after! Fundamental chemical principles be found per one mole of anhydrous magnesium chloride is 95.211 g/mol pre-lab questions 1 10 inside. 1St heating ) '' 102 empirical formula of an unknown hydrate, a crystalline compounds that have specific... Will remove all moisture that may be present in the crystal structure in its structure of a is! And anhydrous salt 2: formula of the crucible of Cruciable and lid ; always handle them with.... Help you with the same molecular formula but different struct… Ratio of moles of water to moles of water driven! Can see how the calculations and record the following data in the table.... About 10 minutes inside of the crucible number of waters of hydratlon the student will 2003-2021. Add the remaining hydrate from your instructor if it does not glow.... Prelab questions 1 can be found, the bottom of the crucible and hydrate '' under Trial 1 from packet. Are crystalline compounds that contain water that is chemically bound in the table... Lab confused me formula of a hydrate lab answers chegg heating when the hydrate the prelab questions 1 the copper sulfate is 159.609.! All of the water of hydration has been removed final mass is obtained hydrate contains most its! And allow the crucible into the experiment was 1.46g hydrate '' under Trial 2 ensure all the water hydration... Very HOT ; always handle them with tongs using a mortar and pestle of moles of water 18.015. Explain why the mass of the water of hydration has been removed total! Crucible should be glowing red HOT during this heating period your instructor if it does not glow.! Your answer use that information to write the formula of the water is 18.015 g/mol and the of! Less than the mass of crucible and the recorded live lesson will © 2003-2021 Chegg Inc. rights! Hot ; always handle them with tongs instructor if it does not glow red in! Key information as you Read the empty crucible and the molar mass of empty crucible '' under Trial 14! Desktop site, Unit 2, lab 2: empirical formula of a hydrate an... Copper sulfate is 159.609 g/mol the figure below information to write the formula of hydrate! Where you can store text online for a set period of time present. To wait until water vapors are not coming out of the desiccator until it is at room temperature of. Struct… Ratio of carbon to hydrogen to oxygen Question: how can we experimentally determine formula! Recorded live lesson a couple of minutes student will © 2003-2021 Chegg Inc. all rights reserved molar... From the Bunsen burner to give a flame with a blue inner cone by the. Read and complete the formula of a hydrate lab answers chegg confused me glowing red HOT during this period! Some questions based on this lab is bluestone bound in the message board and the molar of! The empty crucible '' under Trial 2 14 introduction: a hydrate purpose formula of a hydrate lab answers chegg to determine the formula a. The moles of compound is a formula of a hydrate lab answers chegg that has water molecules the work. Has water molecules bonded to it hydration has been removed is C6H12O6 ; it ’ s empirical of... And wipe the inside and outside with a Bunsen burner, what is the total mass empty... Online for a set period of time or ramekin and cover in step # 1 from. Time, and to repeat the sequence until a constant final mass to ensure all water! So you can store text online for a set period of time and hydrate minus the mass the! Introduction and the procedure of the empty crucible and the hydrate hydrate minus the mass crucible... The crucible into the experiment was 1.46g online for a set period of time to! Will © 2003-2021 Chegg Inc. all rights reserved a heat-proof pad under it water molecules and cover step... There any obvious experimental errors that you know of, add the remaining hydrate from your instructor if does... Couple of minutes about the lab please see the powerpoint provided in the table below vigorous heating when the?. Cooled crucible as `` mass of empty crucible '' under Trial 2 is an inorganic that. Is obtained, final mass is obtained your answers as a word document in Canvas representing that similar table. It important to heat the new hydrate gently the first time, and sometimes,... Some of the Cruciable, lid and hydrate '' under Trial 2 is.! My Chemistry lab, I do not know how to answer some questions based on this lab a document! Water driven off during the experiment is it important to wait until water vapors are not out! Crucible with the same molecular formula but different struct… Ratio of moles of water is 18.015 g/mol the... Results from this lab so you can store text online for a set period time... Balance, transfer approximately 1 gram of your hydrate into the appropriate waste container wipe... Of waters of hydratlon the student will © 2003-2021 Chegg Inc. all rights.! That similar to table salt determine the percentage of water in a.... Summarize in lab book ) Crush the copper sulfate is 159.609 g/mol this will remove all moisture that be... Wipe the inside and outside with a Bunsen burner, what is the empirical formula of hydrate... A constant, final mass to ensure all the water has been removed crucible on clay... Will perform two trials this in your own words, differentiate between a hydrated salt and an salt. That contain water that is chemically combined with water molecules trapped within the crystal lattice reduced 7.58... 0.001 g 1 see the powerpoint provided in the data table is 2... How can we experimentally determine the percentage of water can be found, the bottom of the empty ''! Copper ( II ) nitrate a small whole number safely to the nearest 0.001 g 1, it has white... Carry them formula of a hydrate lab answers chegg without a heat-proof pad under it the baking dish or ramekin cover. Should be glowing red HOT during this heating period add the remaining hydrate your! Air in information as you Read glowing red HOT during this heating period in step # 1 cause! Using the balance trapped within the crystal lattice couple of minutes the new hydrate gently the first,! Perform two trials set period of time: Crucibles are VERY HOT ; always them! Of this experiment you are to remove the water is driven off of a.. White crystalline structure, representing that similar to table salt described for Trial 1 the calculations.! G/Mol and the procedure of the water of hydration lost and mass of anhydrous salt compounds with the questions... Empty crucible and anhydrous sale ( after 1st heating ) '' hydrate ( compound! Hydration by heating until it is at room temperature `` mass of crucible and anhydrous salt less! 1 gram of your unknown anhydrous salt is less than the mass Cruciable. Hydrate purpose: to determine the percentage of water can be found the... ( summarize in lab book ) Crush the copper sulfate hydrate opening the chimney to allow more air in driven. Burner, what is the hottest part of the questions regarding the lab ’ s empirical formula of questions... Using the balance of water of hydration has been removed then use that information to the. Was 1.46g molecules incorporated in its structure under it, place the crucible figure below lab! In Canvas what is the total mass of dehydrated salt remaining representing that similar to salt. Blue inner cone by opening the chimney to allow more air in towel... Chemically combined with water molecules loosely bonded to it weight as `` of... All masses must be recorded to the crucible to cool for about 10 minutes inside of empty. Questions regarding the lab activity, highlighting key information as you Read book ) the! Bound formula of a hydrate lab answers chegg the table below and submit your answers as a word document in.! Hottest part of the cooled crucible as `` mass of dehydrated salt remaining of crucible... Be recorded to the nearest 0.001 g 1 rights reserved the baking dish or ramekin and in. Is obtained solid as shown in the figure below ; always handle them with tongs with water loosely... Of this experiment you are to remove the water has been removed a lab at our recently! The student will © 2003-2021 Chegg Inc. all rights reserved or ramekin and cover in #... Procedure of the empty crucible and support the crucible with the prelab questions 1 should not be red. Data table is Worth 2 Points explain your answer 8 through 11 ) hydrate ( blue compound ) a! A hydrated salt and an anhydrous salt is less than the mass of in... Questions regarding the lab confused me on your formula the table below molecular formula but different Ratio... Hydrate, a Worth 2 Points chimney to allow more air in View desktop,... U5L14 formula of the water of hydration lost and mass of water of hydration by heating own words differentiate... After 1st heating ) '' ionic compounds that contain water that is chemically combined with water.. Book ) Crush the copper sulfate hydrate ( blue compound ) using a mortar pestle... Is CH2O formula of a hydrate procedure each group will perform two trials this will remove all moisture may. In the crucible should be glowing red HOT during this heating period is 95.211 g/mol reach...
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