Question

How many grams of sodium hydroxide (NaOH) do you need to make 6.5 L of 1.0M solution?

Answer 1

260grams

Explanations:

The formula for calculating the moles of NaOH is expressed as

`\begin{gathered} moles=molarity* volume \\ moles\text{ of NaOH}=1.0M*6.5L \\ moles\text{ of NaOH}=6.5moles \end{gathered}`

Determine the required mass of NaOH

`\begin{gathered} Mass\text{ of NaOH}=moles* molar\text{ mass} \\ Mass\text{ of NaOH}=6.5\cancel{moles}*\frac{40g}{\cancel{mole}} \\ Mass\text{ of NaOH}=260grams \end{gathered}`

Hence the grams of sodium hydroxide (NaOH) you need to make 6.5 L of 1.0M solution is 260grams