Question

How many mL of water must be added to 200 mL of .15 M HCL to dilute the solution to 0.04 M?

Answer 1

Answer:

The most important thing to keep in mind when it comes to diluting solutions is that the number of moles of solute must remain constant at all times.

Simply put, the number of moles of solute present in the dilute solution must be equal to the number of moles of solute present in the concentrated sample.

This is the key to any dilution calculation. As you know, molarity is defined as

molarity

=

moles of solute

liters of solution

In essence, when you dilute a solution, you decrease its concentration by increasing its volume, which in turn is done by adding more solvent to the solution.

Explanation:

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