Question

How do you calculate concentration from titration?

Answer 1

`M_AV_A` = `M_BV_B`

Let's assume you are titrating a strong acid (10 mL unknown concentration HCl) with a strong base (1.0 M NaOH). It takes 25mL of NaOH to neutralize the acid. If you solve for `M_A` you will see that

`M_A` = (`M_BV_B`) / `V_A`

or `M_A` = (1.0M x 25mL) / 10

`M_A` = 2.5M HCl

This works because M = moles/L

*Note: You do not need to convert volumes of acid and base to liters as long as both are expressed in same unit (mL).