What is the molarity of a solution made by dissolving 4.88 g of KCl in 423 mL of solution?

chemistry molarity

2 Answers
Sarita Rana
Feb 19, 2018

Molarity = 0.154M

Explanation:

mass of KCl = 4.88g
molar mass of KCl = 74.55 g/mol
no. of moles = 4.88g/74.55 g/mol = 0.0654 moles
volume of solution = 423 ml = 0.423L
Molarity = no. of moles/volume of solution
Molarity = 0.0654 moles/0.423L
Molarity = 0.154M

anor277
Feb 19, 2018

We take the quotient..."molarity"="moles of solute"/"volume of solution"

Explanation:

Here........... "Molarity"=(underbrace((4.88*g)/(74.55*g*mol^-1))_"moles of solute")/underbrace(423*mLxx10^-3L*mL^-1)_"volume of solution"=0.155*mol*L^-1

And note that the quotient automatically gives the units required for "concentration".

Related questions
Impact of this question
8233 views around the world
You can reuse this answer
Creative Commons License