Question
Asked Sep 26, 2019
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How many grams of KNO3 (molar mass = 101.103 g/mol) should be used to make 170.0 mL of 0.060 M solution?

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Expert Answer

Step 1

The values are given as follows:

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molar mass 101.103 g/mol 1L total volume of solution 170.0 mL 1000 mL = 0.17 L molarity of KNO, solution 0.060M -0.060 mol/L

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Step 2

The number of moles of KNO3 can be calculated as follows:

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moles of KNO molarity of KNO volume of solution moles of KNO, 0.060 mol/L 0.17 L moles of KNO = 0.0102 mol

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Step 3

The required number of grams of KNO3 can be determined...

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number of grams of KNO (moles of KNO;)x (molar mass of KNO; 0.0102 mol x101.103 g/mol =1.03 g

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