[Bob42]

I have two questions on my assignment that I am stuck on.

1. If 27.31 mL of 0.2115 M NaOH is able to neutralize 37.45 mL of HCl, what is the concentration of the acid?

2. What volume of 0.117 M HCl is needed to neutralize 28.67 mL of 0.137 M KOH?

I honestly have no idea where to start. I'm hoping someone can point me out to the right direction.

[Borek]

Write balanced reaction equation.

How many moles of NaOH in 27.31 mL of 0.2115M solution?