b. 4. 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. What do the following symbols represent? Full Document. Using your balance, place about 3 grams of the hydrate sample in your evaporating this fraction by 100 gives the percent water. What is the half-life of B? Experimental percentage of water present in your hydrate. (Show work.) Don't require work unless, Dry Lab 2A Inorganic Nomenclature I. Oxidation Numbers, Experiment 7, Empirical Formula, Calculations, Homework Assignment - Microscopy and Cell Structure Lab, Experiment 9 and 10 - Lab report for Professor Driver, Care of the childrearing family (nurs420), Introduction to Environmental Sciences (ENVS 1301), Advanced Concepts in Applied Behavior Analysis (PSY7709), Philippine Politics and Governance (PPG-11/12), Introduction to Interpersonal Communications ( COMM 102), Electrical Machines and Power Electronic Drives (E E 452), Professional Application in Service Learning I (LDR-461), Advanced Anatomy & Physiology for Health Professions (NUR 4904), Principles Of Environmental Science (ENV 100), Operating Systems 2 (proctored course) (CS 3307), Comparative Programming Languages (CS 4402), Business Core Capstone: An Integrated Application (D083), Chapter 1 - Principles of Animal Behavior, Ch1 - Focus on Nursing Pharmacology 6e dish + anhydrous salt. Add them together to get the mass of the hydrate. Experts are tested by Chegg as specialists in their subject area. Make sure you record your data to the correct number of signicant gures and with the proper units. Relative standard deviation of %H 2 O in hydrated salt (%RSD) - Themass~of the anhydrate is obtained and the amount ofwater can be- calculated. anhydrate. 2. Dispose of sample in the correctly marked container. It is useful to know the percent of water contained within a hydrate. 2. Do not leave the crystals in the oven for more than specified time, or they may begin to decompose and turn brown. In this laboratory experiment, you will determine the molecular formula of a known hydrate and the percent composition of a hydrate in a mixture of a hydrate and an inert salt. Instructor: Section: Unknown Hydrate Number Mass of test tube and hydrate, grams Mass of empty test tube, grams Mass of unknown hydrate, grams Mass of test tube and anhydrous hydrate (after heating), Mass of empty test tube, grams Mass of anhydrous hydrate, grams Mass of water lost, grams Did the solution feel hot or cold? lost _______________g H2O, 9. View Experiment 5 Lab Report - Experiment 5: Percent Water in a - Studocu a. The prexes in order are: mono, di, tri, tetra, penta, hexa, hepta, octa, nona, and deca. Measuring the mass. 'Equipinentz" " t w mam/3: CmCible tongs, scoopula, balance, ling Stand, iron ring, Wire gauze, burner, The mass of water in the hydrate is the coefficient (6) multiplied by the molar mass of \(\ce{H_2O}\). From your experimental data, what is the percentage of water in your hydrate? Mass of the anhydrous (without water) Copper(II) sulfate. What is the difference between a hydrated compound and an anhydrous one? (Nearest Whole Numbers) Moles water Moles anhydrous calcium nitrate o. The hydrate listed above is called copper (II) sulfate pentahydrate. The anhydride residue weighs 2.015 grams. Mass of water View 0.6390 g, 1. Reason why it is Why is it important to heat the hydrate thoroughly? (Show work.) m (H 2 O) = 1 1 = 0 g ~; ,., a A the bluer the object. (1 Cu)(63.55 g/mol) + (1 S)(32.07 g/mol) + (4 O)(16.00 g/mol) = 159.62 Pre-Lab Assignment for Analysis of Hydrates 1. 2. If some table salt, NaCl, gets wet, it is now a hydrate! The remaining solid is This lab explores how to remove water from an ionic compound when it is stuck in the compound's crystal lattice. Multiplying a. r; it I On your lab report form draw a diagram of your setup and label all of thepequipment. it. 5. 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. Cross), Brunner and Suddarth's Textbook of Medical-Surgical Nursing (Janice L. Hinkle; Kerry H. Cheever), Campbell Biology (Jane B. Reece; Lisa A. Urry; Michael L. Cain; Steven A. Wasserman; Peter V. Minorsky), Chemistry: The Central Science (Theodore E. Brown; H. Eugene H LeMay; Bruce E. Bursten; Catherine Murphy; Patrick Woodward), Biological Science (Freeman Scott; Quillin Kim; Allison Lizabeth), Psychology (David G. Myers; C. Nathan DeWall), Principles of Environmental Science (William P. Cunningham; Mary Ann Cunningham), Educational Research: Competencies for Analysis and Applications (Gay L. R.; Mills Geoffrey E.; Airasian Peter W.), PRELAB 5 PERCENT WATER IN A HYDRATED SALT QUESTIONS 3,5,6, Dry Lab 2A - These are for Lab Professor Graeme or Constantino. the redder the object. Using the actual formula of the hydrate given to you by Mr. E, and the atomic masses on the periodic table calculate the theoretical percentage of water present in the hydrate. Percent of water in the hydrate sample. 6. 4. am": The mass of the anhydrous salt and test tube was 31.0035 grams. 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. Calculate the percent by mass of water by dividing the mass of \(\ce{H_2O}\) in 1 mole of the hydrate by the molar mass of the hydrate and multiplying by \(100\%\). To write the formula of a hydrate, the compound is written followed by 0 and then the Pre-lab questions can be assigned as homework, in advance on the lab. Spring 2017 - CHE 117 - Lab 09b - Determining Avogadro's Number, Spring 2017 - CHE 117 - Lab 01b - Percent Water in a Hydrate (1).doc, Spring 2022 - CHE 117 - Lab 10 - PreLab Lecture (1).pptx, Spring 2017 - CHE 117 - Lab 08 - Alkalinity and the Carbonate System(1), Spring 2017 - CHE 117 - Lab 05 - The Determination of an Equilibrium Constant, Unformatted text preview: Percent Water in a Hydrate Calculate the value of " n ", the number of moles of water molecules present per mole of CuSO 4 and Epson Salts. Procedure 1. It is generally possible to remove the water of hydration by heating the hydrate. Autumn-D Date: [(23 l .3 Section: 17 Purpose: To determine the percentage of water in a hydrate. Properties of Hydrates. Be careful when handling hot glassware and equipment. 3. The hydrate is a compound formed by an ionic bond combined with the water molecule (known as "water of hydration") attached to it. The mass of a fost tube and hydrate was 35.2755 grams. (Show work for credit.) 5. PDF Determining the Formula of a Hydrate - KVCC Think coefficients!). stream Then heat the test tube more strongly until no more droplets of water can be seen forming on the inside of the test tube. 2.09 x 100 = 20.9%. ~ ~. The mass of the anhydrous salt and test tube was 31.0035 grams. Predict the percent of water in a hydrate mathematically. (aq) 9. experimental percentage of water in a hydrate found by comparing the mass of water released (when heated) to the original mass of the compound, expressed as a percentage; it is done in the labratory by measuring the mass of the compound before and after heating hydrate to remove the waters of hydration and then measuring the mass of the barium chloride in the container provided. Experimental value - theoretical value Theoretical value x 100 6. hydrate Gypsum is a hydrate minutes to knock out any of the water of hydration. a 1. PDF Lab Exercise: Percent Water in a Hydrate - gccaz.edu separate the water from the ionic compound by heating it. Determine the percentage of water experimentally. structure. Answer1) Ahydrateis a solid ionic compound that contains specific number of water molecules in its crystal structure. Then heat the sample (About 10 minutes) 7. Subtract the two to determine the mass of your unknown. A hydrate is a compound that has one or more water molecules bound to each formula unit. In this lab you will determine the percentage of water contained in various hydrates. Chemistry Pre-Lab Quiz (Hydrate Lab) Flashcards | Quizlet 1. d. What is the ratio of moles of water to moles of anhydrous calcium nitrato? You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Determine the number of moles of water, x, per mole of anhydrous salt and write the chemical formula of the hydrate sample. The mass of the water divided by the initial mass of the hydrate will give you the mass percent of water in the hydrate. This is your experimental value. 1. Think coefficients!). 3. 2. m (1, 4 5/)anh7droos saH' Solved Lab 09 - Percent of Water in a Hydrate Pre-Lab - Chegg c. The ionic compound was found to be calcium nitrate. Course Hero is not sponsored or endorsed by any college or university. PDF Percent Water in Hydrate Lab - Erlenbeck's Science Room - ,)., Name the following compounds: a. SrCl2.6 H20 b. MgSO4-7 H20 4. The molar mass of the hydrate is the molar mass of the \(\ce{CoCl_2}\) plus the mass of water. Determine the percentage of water experimentally. after first heating _______________g (#4 - #1), 6. If someone were to tell you that copper sulfate is white, you likely would not believe them. 2. Lab Report on Hydrates - Docsity Autumn-D Date: [(23 l .3 Section: 17 Purpose: To determine the percentage of water in a hydrate. 8. Find the percent water in cobalt (II) chloride hexahydrate, \(\ce{CoCl_2} \cdot 6 \ce{H_2O}\). percent hydrate lab percent composition of hydrate lab introduction: ionic compounds often separate from water solution with molecules of water incorporated. known as the anhydrous salt. However, it turns out that you are both right; it just depends on the copper sulfate. Using the correct formula, find the percent water in copper (II) sulfate pentahydrate. Substances that are physically combined can be separated by physical means. Lab 09 - Percent of Water in a Hydrate Pre-Lab Questions Name: Date: Instructor: Section: Read the following laboratory experiment and answer the questions below. Answer the following and show all work for credit a. How many moles of calcium nitrate are contained in the anhydrous sample? In another experiment, the mass of a hydrate was found to be 2.7090 grams. 1. What are the safety precautions in this experiment? Percentage of Water in a Hydrate Pre-Lab Quiz Flashcards | Quizlet The following experimental data were obtained for an unknown hydrate. Accessibility StatementFor more information contact us atinfo@libretexts.org. %water of hydration = (mass lost during heating)/(mass of original sample) X 100%. pre lab "percentage of water in a hydrate" Flashcards | Quizlet Allow the crucible to cool, then weigh Experiment_605_Hydrates_1_2_1 - Chemistry LibreTexts
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