Question

To make a 2.0-mole solution, how many moles of solute must be dissolved in 0.50 liters of solution?

0.25 moles solute

0.50 moles solute

1.0 mole solute

2.0 moles solute

Answer 1

Answer : The correct option is, 1.0 mole

Explanation : Given,

Molarity of solution = 2.0 mole/L

Volume of solution = 0.50 L

Molarity : It is defined as the number of moles of solute present in one liter of solution.

Formula used :

`Molarity=\frac{\text{Moles of solute}}{\text{Volume of solution}}`

Now put all the given values in the above formula, we get the moles of the solute.

`2.0mole/L=\frac{\text{Moles of solute}}{0.50L}`

`\text{Moles of solute}=1.0mole`

Therefore, the number of moles of solute dissolved in the solution will be, 1.0 mole

Answer 2

To make a 2.0-molarity solution in 0.50 liters of solution
M = moles of solute / liter solution
2 molarity = moles of solute / 0.5 liters of solution
moles of solute = 1 moles of solute