Question

How many moles of HCI are needed to prepare 8.0 liters of a 4.0 M solution of HCI?

Answer 1

Answer: 32 mol HCI

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

$Molarity=\frac{n}{V_s}$

where,

n = moles of solute

$V_s$ = volume of solution in Liters

Now put all the given values in the formula of molarity, we get

$4.0M=\frac{moles}{8.0L}$

$moles={4.0M\times 8.0L}=32mol$

Therefore, the moles of HCI needed to prepare 8.0 liters of a 4.0 M solution of HCI are 32.