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# How would you prepare 3.5 L of a 0.9M solution of KCl?

### Customer Question

How would you prepare 3.5 L of a 0.9M solution of KCl?
Submitted: 8 months ago.
Category: Homework
Expert:  GLENN replied 8 months ago.

Hi

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Customer: replied 8 months ago.
now
Expert:  GLENN replied 8 months ago.

Since molarity = number of moles / liters of solution, then
let x be the number of moles of KCl
0.9 M = x / 3.5L, then x = 0.9 (3.5) = 3.15 moles

Since the molar mass of KCl is 74.5513g/mol, then 3.15 moles of KCl is
= 3.15mol (74.5513g/mol) =###-##-####gms

so dissolved###-##-####gms of KCl into 3.5 Liters of solution in order to produce 0.9M of solution of KCL
.

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Expert:  GLENN replied 8 months ago.