Question

Calculate the molarity when 250 mL of solution is prepared from 5.00 g KOH.

Answer 1

the formula for molar concentration c is

c=moles/litres

moles 5.6g KOH×1mol KOH/56.11gram KOH

0.0998mol KOH

litres=250ml×1L/1000mL=0.2500L

c=0.0998mol/0.2500L

=0.40 mol/L