Question

a student was asked to prepare a 20% (volume by volume) solution of ethanol in water how should the student do it​

Answer 1

Explanation:

ANSWER

'C' has made the desired solution

Mass by volume %=

Volume of solution

Mass of solute

×100

=

100

50

×100

=50% mass by volume

50 % Mass by volume means 50g of NaOH is dissolved in 100ml of solution. So C makes the solution. A has taken 100 ml of water itself. Hence, A does not make the desired solution. B has taken 100 gm of water. Thus, for B also, the solution will not be 50% mass by volume.

Answer 2

Answer:

idk sorry really sorry

Explanation:

my bad