Question

Question #2b580

Answer 1

You must use 100 mL of 0.1 mol/L `"NaOH"`.

Explanation:

Step 1. Write the balanced chemical equation.

`"2NaOH + H"_2"SO"_4 → "Na"_2"SO"_4 + 2"H"_2"O"`

Step 2. Calculate the moles of `"NaOH"`

`"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 `"NaOH"`

`"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 `"NaOH"`.