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How do you solve for the exact molarity of KIO3 solution?

How do you solve for the exact molarity of KIO3 solution?

Chemistry
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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How do you solve for the exact molarity of KIO3 solution? 

Procedure: Week One: Preparing your solutions. Gather the following materials: I. • 50-mL, 100-mL and 250-mL volumetric flasks with ground glass stoppers narrow-stem glass funnel a small beaker for DI water, a squirt bottle of DI water, and a disposable plastic dropper Prepare 50 mL of 0.200 M KIO3. Because a dilution of the KIO3 solution will be used to standardize the NazS203 titrant, the KIO3 solution must be prepared with high accuracy. А. Using an analytical balance, weigh out the calculated mass of KIO3 into a clean, tared weighing boat. It is not necessary to weigh out exactly the mass you calculated. Instead, weigh out a mass close to the calculated mass, and record the exact mass of salt used to as many decimal places as the balance allows. Using a funnel, transfer the KI03 solid into a 50 mL volumetric flask. Rinse the weigh boat and funnel with small amounts of DI water to ensure complete transfer of the salt. Fill the volumetric flask with DI water until the flask is about 2/3 full. Swirl the flask vigorously until the solid dissolves completely. Fill the flask with DI water to the calibration mark on the neck, so that when viewed at eye level, the bottom of the meniscus aligns exactly with the calibration mark. Pour DI water from a small beaker, or squirt it from a squirt bottle, in order to quickly deliver the majority of the volume, but add the last few drops with a disposable dropper to achieve the best accuracy. Stopper the flask and invert it ~10 times to mix the solution well. Calculate the exact molarity of the resulting solution to as many significant figures as possible. Show your calculation and record your exact molarity below. Label your solution with the identity of the solution, its exact molarity, your name, and the date. Approximate mass of KIO3 needed 2. 7089 2.7019 Exact mass of KIO3 weighed Exact molarity of KIO3 solution Calculation: 153
Transcribed Image Text:Procedure: Week One: Preparing your solutions. Gather the following materials: I. • 50-mL, 100-mL and 250-mL volumetric flasks with ground glass stoppers narrow-stem glass funnel a small beaker for DI water, a squirt bottle of DI water, and a disposable plastic dropper Prepare 50 mL of 0.200 M KIO3. Because a dilution of the KIO3 solution will be used to standardize the NazS203 titrant, the KIO3 solution must be prepared with high accuracy. А. Using an analytical balance, weigh out the calculated mass of KIO3 into a clean, tared weighing boat. It is not necessary to weigh out exactly the mass you calculated. Instead, weigh out a mass close to the calculated mass, and record the exact mass of salt used to as many decimal places as the balance allows. Using a funnel, transfer the KI03 solid into a 50 mL volumetric flask. Rinse the weigh boat and funnel with small amounts of DI water to ensure complete transfer of the salt. Fill the volumetric flask with DI water until the flask is about 2/3 full. Swirl the flask vigorously until the solid dissolves completely. Fill the flask with DI water to the calibration mark on the neck, so that when viewed at eye level, the bottom of the meniscus aligns exactly with the calibration mark. Pour DI water from a small beaker, or squirt it from a squirt bottle, in order to quickly deliver the majority of the volume, but add the last few drops with a disposable dropper to achieve the best accuracy. Stopper the flask and invert it ~10 times to mix the solution well. Calculate the exact molarity of the resulting solution to as many significant figures as possible. Show your calculation and record your exact molarity below. Label your solution with the identity of the solution, its exact molarity, your name, and the date. Approximate mass of KIO3 needed 2. 7089 2.7019 Exact mass of KIO3 weighed Exact molarity of KIO3 solution Calculation: 153
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