# What's V2 in general/how do you calculate it step by step?

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This is the question: If I add 25 mL of water to 125 mL of a 0.15 M NaOH solution, what will the molarity of the diluted solution be?

This is the question: If I add 25 mL of water to 125 mL of a 0.15 M NaOH solution, what will the molarity of the diluted solution be?

##### 1 Answer

#### Answer:

Well volumes are generally additive, and of course the concentration will be diluted.

#### Explanation:

By one of the definitions,

And thus

And so.....the new concentration will be given by the quotient....

This goes back to the old equality,

Here we solved for