Question

Problem 2.17 : Calculate the molarity of NaOH in the solution prepared by dissolving its 4 g in enough water to form 250 mL of the solution​

Answer 1

Answer:

Molarity = moles of solute / Volume of solution in L

Mass of NaOH = 4g

Molecular mass of NaOH = 40g

Moles = 4/40 = 0.1mole

Volume of solution = 250ml = 250 ×10^(-3) L

=0.250 L

Molarity = 0.1/ 0.250 = 0.4 M