Question

find molar strength or molarity of a solution containing 10 % (w/v) NaOH

Answer 1

10% (W/V) means 10 grams in 100ml solution. Molarity is calucalted for 1000 ml solution. So, we can say, if 10gm in 100ml then for 1000ml the amount of NaOH is 100gm. In terms of moles = 100/40= 2•5 moles.