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You want to prepare 1.0 L of a 0.15 M NaCl solution in DI water. Show...

You want to prepare 1.0 L of a 0.15 M NaCl solution in DI water. Show the calculations needed to prepare this solution and explain the steps you would need to take to prepare it using the solid crystal NaCl and DI water. The molecular weight of NaCl is 58.44 g/mol.

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Answer #1

Solution= Molecular weight of NaCl is 58.44 g/mol. This means that 1 mol of NaCl contain 58.44 g in 1litre of the solution. Now calculate for 0.15 M NaCl .

1000ml of 1M NaCl contains = 58.44 g

1000ml of 0.15 NaCl contains = 58.44/0.15 g

= 389.6 g

Therefore 389.6 g of solid crystal NaCl is added in 1L deionised water to make 0.15 M of NaCl in 1L.

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