Question

How many moles of NaOH are needed to make 4.5 L of a 1.5 M NaOH solution?

• A. 6.75 mol
• B. 0.34 mol
• C. 0.33 mol
• D. 3.07 mol

Answer 1

The correct option is A 6.75 mol

1.5 M NaOH means 1.5 moles of NaOH are present in 1 L of solution.
1 L of solution contains 1.5 moles of Na.
4.5 L of solution will contain = $\frac{1.5}{1}\times 4.5=6.75$ moles
Therefore, number of moles of NaOH required = 6.75 moles