# Question #2b580

May 21, 2017

You must use 100 mL of 0.1 mol/L $\text{NaOH}$.

#### Explanation:

Step 1. Write the balanced chemical equation.

$\text{2NaOH + H"_2"SO"_4 → "Na"_2"SO"_4 + 2"H"_2"O}$

Step 2. Calculate the moles of $\text{NaOH}$

$\text{Moles of NaOH"= 5× 10^"-3" color(red)(cancel(color(black)("mol H"_2"SO"_4))) × "2 mol NaOH"/(1 color(red)(cancel(color(black)("mol H"_2"SO"_4)))) = "0.01 mol NaOH}$

Step 3. Calculate the volume of $\text{NaOH}$

$\text{Volume of NaOH" = 0.01 color(red)(cancel(color(black)("mol NaOH"))) × "1 L NaOH"/(0.1color(red)(cancel(color(black)("mol NaOH")))) = "0.1 L NaOH" = "100 mL NaOH}$

You must use 100 mL of $\text{NaOH}$.