Question

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

0.5 mol HCL

32 mol HCI

12 mol HCL

2 mol HCI
​

Answer 1

Answer: 32 mol HCI

Step-by-step explanation:

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

`Molarity=(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=(moles)/(8.0L)`

`moles={4.0M* 8.0L}=32mol`

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