Question

An aqueous solution which is 20% (w/w) and 30% (w/v) in NaOH. What will be mass fraction of water
in 30 ml of such s

Answer 1

Answer:

Let x be the mass of solution. 30% w/v of NaOH corresponds to 30 gm of NaOH in 100 ml solution. Amount of NaOH present in 1000 ml solution is 300 gm. Molarity of NaOH=300/40×1000/1000=7.5 M.