Calculate the molarity 20ml of 3.5 m kci in to a final volume of 100 ml

Molarity = 0.7 M

Explanation:

Given dа ta:

Volume of KCl = 20 mL (0.02 L)

Molarity = 3.5 M

Final volume = 100 mL (0.1 L)

Molarity in 100 mL = ?

Solution:

Molarity = number of moles of solute / volume in litter.

First of all we will determine the number of moles of KCl available.

Number of moles = molarity * volume in litter

Number of moles = 3.5 M * 0.02 L

Number of moles = 0.07 mol

Molarity in 100 mL.

Molarity = number of moles / volume in litter

Molarity = 0.07 mol / 0.1 L

Molarity = 0.7 M