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Asked Oct 25, 2019
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What is the concentration, in mol/L, where 137 g of NaCl has been dissolved in enough water to make 500 mL
of solution?
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What is the concentration, in mol/L, where 137 g of NaCl has been dissolved in enough water to make 500 mL of solution?

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Expert Answer

Step 1

Given,

Mass of NaCl = 137 g

Volume of solution = 500 mL = 0.5 L    (1 mL = 0.001 L)

Moles of NaCl can be calculated as:

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Molar mass of NaCl 23 35.5 58.5 g/mol = 137 g Mass Moles of NaCl = = 2.342 mol 58.5 g/mol Molar mass

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Step 2

The concentration in mol/L of the NaCl...

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Moles of NaC Concentration Volume of solution in litres 2.342 mol Concentration 0.5 L Concentration 4.684 mol/L

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