Question
Asked Jan 25, 2020
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A student prepares a solution by dissolving 6.40 g of solid KOH in enough water to make 400.0 mL of solution. Calculate the molarity of K+ ions in this solution.

 

A 30.00 mL sample of this KOH solution is added to a 250 mL volumetric flask, and water is added to the mark. What is the new molarity of K+ ions in this solution?

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Expert Answer

Step 1

Given data:

Chemistry homework question answer, step 1, image 1
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Step 2

Part I

The molarity of K+ is calculated by the formula shown below.

Chemistry homework question answer, step 2, image 1
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Step 3

The number of moles of KOH is ca...

Chemistry homework question answer, step 3, image 1
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