Preparation of standard ethylenediaminetetraacetic acid copper(II) disodium salt solutionMass of ethylenediaminetetraacetic acid copper(II) disodium salt (+ 0.002 g.)|0.613 gMolar mass of ethylenediaminetetraacetic acid copper(II) disodium salt = 397.74 g mol-.Show your calculations here (with appropriate number of significant digits and units in final result)amount (mol) of solutevolume of solution (litres)MolarityConcentration of ethylenediaminetetraacetic acid copper(II) disodium salt =Answer: 0.0154 mol/LUse this to check your calculation as part ofpreparing for the lab test for this experiment. MethodNote: In steps 1 and 2 you will use the technique of weighing by difference to measure the exact mass of the sample of theethylenediaminetetraacetic acid copper(II) disodium salt. This technique is described in the 'Techniques' section above andis available to watch as a chemistry skills video online (link available in Moodle).Weigh the ethylenediaminetetraacetic acid copper(II) disodium salt1. If the sample tube on the balance is not already about one-third filled, fill it to about 1/3 of its height withethylenediaminetetraacetic acid copper(II) disodium salt. Place a plastic spatula in the sample tube with theethylenediaminetetraacetic acid copper(II) disodium salt and place on an analytical balance. Tare the balance so that itreads zero.Warning: After carrying out step 1, do not place the spatula on the bench, as this may result in a loss of sample, andhence an incorrect determination of the mass of the sample.2. Using the spatula, transfer without loss (i.e. don't spill any), some of the solid from the sample tube into a 100 or 150mL beaker. Replace the spatula and reweigh the sample tube and spatula. Repeat until you have about 0.6 g in yourbeaker. Record on the results page the exact mass of the ethylenediaminetetraacetic acid copper(II) disodium saltweighed. The balance reading will be negative since the tube contains less solid for the second reading than the first.Dissolve the ethylenediaminetetraacetic acid copper(II) disodium salt in water in a beaker3. Add about 50 mL of water to the beaker to dissolve the ethylenediaminetetraacetic acid copper(II) disodium salt.Carefully swirl the mixture to aid dissolution. Do not spill the solution!Warning: Make sure you use the correct technique for using a volumetric flask in the steps below.Transfer the solution into a volumetric flask and rinse the beaker into the volumetric flask4. Using a plastic funnel, transfer the solution into a clean 100 mL volumetric flask being careful not to lose any. Rinsethe beaker and funnel with a jet of water from a wash bottle several times to ensure all the ethylenediaminetetraaceticacid copper(II) disodium salt is transferred to the volumetric flask.Carefully add water to volumetric flask to the mark and mix solution in the flask5. Add water carefully from a beaker until the water level is 1 to 2 cm below the graduation mark on the neck of thevolumetric flask.6. Using a squash pipette, add water drop by drop until the bottom of the meniscus is in line with the graduation mark onthe flask (warning: if the bottom of the meniscus goes over the graduation mark, you have to start again). Stopper theflask and mix thoroughly (this is important!). While holding the stopper in place, tum the flask upside down severaltimes.7. Calculate the concentration of your ethylenediaminetetraacetic acid copper(II) disodium salt solution, based on the actualmass weighed out.Preparing a sample of your standard solution for analysis8. Rinse out a cuvette using some of the standard solution that you have just made (a new clean squash pipette should beused for the transfer). Repeat, rinsing out the cuvette a second time. Next fill the cuvette to % full with the standardsolution and take this to your demonstrator.9. Your demonstrator will measure the light absorbance of your solution, which you should record and then complete therequired calculations. The light absorbance depends on concentration so this is a way to determine how accurate youhave been in weighing the solute and using the volumetric flask.Clean up10. Dispose of all copper solutions into the heavy metals chemical waste container in the fume cupboard. Wash and cleanall glassware and apparatus that you have used with detergent provided at the sinks and return them to where you gotthem and ask vour demonstrator to check vour locker.

Preparation of standard ethylenediaminetetraacetic acid copper(II) disodium salt solution Mass of ethylenediaminetetraacetic acid copper(II) disodium salt (± 0.002 g.) 0.613 g Molar mass of ethylenediaminetetraacetic acid copper(II) disodium salt = 397.74 g mol–1. Show your calculations here (with appropriate number of significant digits and units in final result) amount (mol) of solute volume of solution (litres) Molarity Concentration of ethylenediaminetetraacetic acid copper(II) disodium salt =

Preparation of standard ethylenediaminetetraacetic acid copper(II) disodium salt solution Mass of ethylenediaminetetraacetic acid copper(II) disodium salt (± 0.002 g.) 0.613 g Molar mass of ethylenediaminetetraacetic acid copper(II) disodium salt = 397.74 g mol–1. Show your calculations here (with appropriate number of significant digits and units in final result) amount (mol) of solute volume of solution (litres) Molarity Concentration of ethylenediaminetetraacetic acid copper(II) disodium salt =

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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