Question

How many milliliters of 0.100M NaOH are required to neutralize the following solution 5.00mL of.0500M HCI

Answer 1

1) Set the chemical equation

`\text{NaOH + HCl = NaCl + H}_2O`

2) Find out how many moles of HCl react in the solution.

`\text{moles of HCl = }\frac{0.0500\text{ M}}{\square}\cdot\frac{5.00\text{ mL}}{\square}\cdot\frac{1\text{ L}}{1000\text{ mL}}=\text{ 0.00025 moles of HCl}`

3) Find out how many moles of NaOH reacted with HCl

`\text{moles of NaOH = }\frac{0.00025\text{ moles of HCl}}{\square}\cdot\frac{1\text{ mole of NaOH}}{1\text{ mole of HCl}}=\text{ 0.00025 moles of NaOH}`

4) Find out the milliliters of NaOH

`mL\text{ of NaOH = }\frac{0.00025\text{ moles of NaOH}}{0.100\text{ M}}\cdot\frac{1000\text{ mL}}{1\text{ L}}\text{= 2.50 mL}`