.3! 4. On your lab report form draw a diagram of your setup and label all of thepequipment. 4. Lab 5. 5. Thus, in this experiment it is our goal to determine the percent of water in an unknown hydrate as well as the formula of the hydrate. The name of the compound is cobalt (II) chloride hexahydrate and its formula is CoCl 2 6H 2O. Record your observation on Data Table. c. The ionic compound was found to be calcium nitrate. H2O, into the weighed crucible and weigh the From its formula, what is the percentage of water in your hydrate? What is the difference between a hydrated compound and an anhydrous one? Calculate . This lab explores how to remove water from an ionic compound when it . Lab 2: Determine the Percentage of Water in a Hydrate: The goal of this experiment is to learn how to properly calculate the ratio of salt to water, in a hydrated salt, and to calculate the percentage of water (by mass) within a hydrated salt. Answer1) Ahydrateis a solid ionic compound that contains specific number of water molecules in its crystal structure. Calculate the percent of water (by mass) contained in a hydrated salt. Percent Water is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by LibreTexts. (Convert mass to moles.) minutes to knock out any of the water of hydration. Multiplying The mass of the anhydrous salt and test tube was 31.0035 grams. Make sure you record your data to the correct number of signicant gures and with the proper units. the barium chloride in the container provided. What is the percent water in calcium nitrate tetrahydrate? Compare this to the two-dimensional case. 20.1-23- - . Using the data collected, determine the mass of the hydrate that you started with: If someone were to tell you that copper sulfate is white, you likely would not believe them. The mass of water evaporated is obtained by subtracting the mass of the anhydrous solid from the mass of the original hydrate (\ref{3}): The greater the temperature difference between two temperature reservoirs, the more ________ can be done. PRE-LAB ASSIGNMENT The After preparing the weighing bottles, weigh each weighing bottle on the analytical balance to the nearest 0.0001 g. Record the masses, time and date in the prepared format in your notebook. To findthe coefcient in front of the H20 in the formula of the hydrate, the # moles of of hydrate used is equal to the fraction of water in the compound. & BaCl2 after second heating _______________g, 7. What is the difference between a hydrated compound and an anhydrous one? 3. CuSO4 5 H2O(s) + HEAT ---> CuSO4 (s) Ex: CuSO45 H2O(s) is a hydrate that contains one copper (II) formula unit with 5 molecules of water attached. 2. Instructor Test Bank, BIO 115 Final Review - Organizers for Bio 115, everything you need to know, C225 Task 2- Literature Review - Education Research - Decoding Words And Multi-Syllables, ECO 201 - Chapter 5 Elasticity and Its Applications, Tina Jones Health History Care Plan Shadow Health.pdf, Summary Give Me Liberty! A hydrate is a compound that has one or more water molecules bound to each formula unit. Discuss. Pre-Lab Assignment for Analysis of Hydrates 1. Add them together to get the mass of the hydrate. : an American History - Chapters 1-5 summaries, BUS 225 Module One Assignment: Critical Thinking Kimberly-Clark Decision, 1-2 Short Answer Cultural Objects and Their Culture, Week 1 short reply - question 6 If you had to write a paper on Title IX, what would you like to know more about? Autumn-D Date: [(23 l .3 Section: 17 Purpose: To determine the percentage of water in a hydrate. If you look at a typical bottle of copper sulfate, it will be a bluish-green. A hydrate that has lost its water molecules is said to be 3. (Convert mass to moles.) Record the number of that sample on your Data Table. 1. 153.65; - 5144i , . ' Do not leave the crystals in the oven for more than specified time, or they may begin to decompose and turn brown. a. the anhydrate remaining. d. What is the ratio of moles of water to moles of anhydrous calcium nitrate? Obtain an unknown sample of a hydrate. Standard deviation of %H 2 O Digication ePortfolio :: General Chemistry (Alexander Antonopoulos) by Alexander P. Antonopoulos at Salve Regina University. Other 2. To name hydrates, just name the ionic compound and then use the same prefixes as used to name molecular/non-acids, to indicate the number of water molecules in the hydrate. Mass of evaporating dish + anhydrous salt Match. The hydrate is a compound formed by an ionic bond combined with the water molecule (known as "water of hydration") attached to it. after second heating _______________g (#6 - #1), 8. Trial 1Trial 2 8.45%9% 8 9 = -1 (-1)9 9 = -0 (-0) 22 = 1= 0. 5. Answer the following and show all work for credit a. 1. Pre-Lab E Comparison of your experimental results to the reference information you produced in your Pre-lab should allow you to identify the unknown. Name the following compounds: a. SrCl2-6 H20 b. MgSO4-7 H20 4. 4. The following experimental data were obtained for an unknown hydrate. Learn. Give the chemical formulas for the following. Average percent H 2 O in hydrated salt (%H 2 O) = 9% Then heat the test tube more strongly until no more droplets of water can be seen forming on the inside of the test tube. Name the following compounds: a. SrCl2.6 H20 b. MgSO4-7 H20 4. (Show work.) nonmetal, or compounds that contain a polyatomic ion. separate the water from the ionic compound by heating it. Answer 2) Ahydrate that, Lab 09 - Percent of Water in a Hydrate Pre-Lab Questions Date: Name: - Section: Instructor: - Read the following laboratory experiment and answer the questions below. For a D-MOSFET biased at VGS=0V_{G S}=0VGS=0, is the drain current equal to zero, IGSSI_{G S S}IGSS, or ID5sI_{D 5 s}ID5s ? A power plant uses a 900 Kelvin boiler and a river at 300 Kelvin for cooling. Record the masses in your laboratory notebook. The process of calculating the percent water in a hydrate is described. Give the chemical formulas for the following two hydrates. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Wear safety goggles. Determine the mass percentage of water in a hydrate 5. %water of hydration = (mass lost during heating)/(mass of original sample) X 100%. View pilli 6. Section 1: Purpose and Summary . 2. The half-life of A is 0.50 hours. Why is the crucible cover not set directly atop the crucible when heating? 3. Lab 5. : an American History (Eric Foner), Forecasting, Time Series, and Regression (Richard T. O'Connell; Anne B. Koehler), Business Law: Text and Cases (Kenneth W. Clarkson; Roger LeRoy Miller; Frank B. From its formula, what is the percentage of water in your hydrate? Ill/v: _ r \ l 5. Accurately This resource is a classic chemistry laboratory to find the percent of water in the copper (II) sulfate hydrate. dish. Record this mass to +0.01 g. Subtract the two to determine the mass of your unknown. Obtain a large Pyrex or Kimax test tube and weigh it to the correct number of significant digits on an analytical balance. Unformatted text preview: Percent Water in a Hydrate ' r Adaptgd'om a lab by Sally Mitchell Namei 1'3 LEV. Experimental value theoretical value Theoretical value x 100 6. 2. The name of the compound is cobalt (II) chloride hexahydrate and its formula is \(\ce{CoCl_2} \cdot 6 \ce{H_2O}\). (Convert mass to moles.) Lab 09 - Percent of Water in a Hydrate Pre-Lab Questions Date: Name: - Section: Instructor: - Read the following laboratory experiment and answer the questions below. The mass of the empty test tube was 23.7726 grams. the mass of the water lost by the mass of hydrate and multiply by 100. b. Name the following compounds: a. SrCl2-6 H20 b. MgSO4-7 H20 4. + 5 H2O (g) Show all work in the space This page titled 10.11: Percent of Water in a Hydrate is shared under a CK-12 license and was authored, remixed, and/or curated by CK-12 Foundation via source content that was edited to the style and standards of the LibreTexts platform; a detailed edit history is available upon request. l.;1! (Show work.) 7H 2 O) is a heptahydrate of magnesium sulfate: within one mole of magnesium sulfate heptahydrate are seven moles of water. (aq) 9. 4. 1. The reaction for the decomposition is as follows: CuSO4 5H2O (s)= => SO2(g) + CuO (s) + 5H2O. The remaining solid is Gypsum is a hydrate The sample problem below demonstrates the procedure. If some table salt, NaCl, gets wet, it is now a hydrate! Safety Always practice safe laboratory procedures. Lab 09 - Percent of Water in a Hydrate Pre-Lab Questions Date: Name: - Section: Instructor: - Read the following laboratory experiment and answer the questions below. This is your theoretical value. The number of water molecules in a typical hydrate is characteristic of . mass of woc:mass of HS, experimental percentage of water can be found by. After heating, the anhydrous sample had a mass of 1.8820 grams. 1. Mass of the anhydrous (without water) Copper(II) sulfate. & BaCl2 after first heating _______________g, 5. water of crystallization. Place the weighing bottles in a 50mL beakers in a 800 mL beaker, cover with a watch glass, and heat for specified time at some temperature to drive off the water of hydration. In another experiment, the mass of a hydrate was found to be 2.7090 grams. 3. This is the pre-lab video for the . (s) b. 6. Put on your CHEMICAL Using the correct formula, find the percent water in copper (II) sulfate pentahydrate. To the percent water a hydrate, the mass of a,hydrate is obtained. The difference between the hydrate mass and anhydrate mass is the mass of water lost. Answer1) A hydrate is a solid ionic compound that contains specific number of water molecules in its crystal structure. of the primary material. The procedure is clearly defined so that there is no question about the proper way to safely perform the lab. theoretical percentage of water. Experts are tested by Chegg as specialists in their subject area. examples of hydrates are: lithium perchlorate trihydrate - LiClO4 found by comparing the mass of the water of crystallization to the mass of the hydrate salt. Purpose To find the percent of water in an unknown hydrate. 79mm) x- _. " Then the How many moles of calcium nitrate are contained in the anhydrous sample? Prior Knowledge: 2.8: Atoms and the Mole; 2.9: Calculations Determing the Mass, Moles and Number of Particles a. What are the safety precautions in this experiment? Using the correct formula, find the percent water in copper (II) sulfate pentahydrate. Why is the crucible cover not set directly atop. You'll get a detailed solution from a subject matter expert that helps you learn core concepts.
