Question

13. Molarity of 40% NaOH (w/w) solution is 12M. Its
density will be
(1) 1.0 g/ml
(2) 1.5 g/ml
(3) 1.2 g/ml
(4) 1.38 g/ml​

Answer 1

Answer: answer is (3)

Explanation:

Answer 2

Answer:

16.66m

Explanation:

40 % NaOH (w/W) means that 40 g pure NaOH is present in 100 g f solution.

Volume of solution =Mass of solutiondensity=1001.2ml

Molarity (M) =wmV (in ml)/1000=wm×1000V(in ml)

=4040×1000100×1.2=12M

Molality (m) =w/mMass of solvent (in kg)=40/40(100−40)1000

=4040×100060=16.66m