# AP Chemistry

How many moles of NaOH will it take to neutralize 0.77 L of 0.81 M HCl?

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1. All of this type can be worked the same way.
1. Write and balance the equation.
NaOH + HCl ==> NaCl + H2O

2. How many mols do you have?
mols = M x L = 0.81M x 0.77L = 0.624

3. Since 1 mol NaOH = 1 mol HCl (from the equation), then mols HCl = mols NaOH.

4. Those three steps work the problem USUALLY, however, the question is what volume of say 0.5 M NaOH will it take? That is mols NaOH = 0.624
M = mols/L. You know mols and M, solve for L.

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