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In Part B, you will determine the concentration of a saturated calcium iodate solution by titrating against a known concentration of sodium...

In Part B, you will determine the concentration of a saturated calcium iodate solution by titrating against a known concentration of sodium thiosulfate (Na2S2O3) solution.

Use the balanced equation for the reaction in Experiment 5, given on page 5-3 of the Lab Manual, to answer the following question.

A titration was set up with 10 mL of saturated calcium iodate solution in an acidified solution. A burette was filled with 0.05 mol L-1sodium thiosulfate solution. To reach the end point, 17.5 mL of the thiosulfate solution was required.

Find the concentration of the saturated calcium iodate solution, in mmol L-1. Do not include units in your answer.

This guide to solving concentration calculations may help. Examples of this type of calculation can also be found in Blackman.

HINT: Remember to consider the stoichiometry of calcium iodate as well as the titration equation (how many iodate ions in calcium iodate?).


How to calculate the calcium iodate concentration.?

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