Question

A 30% solution of ethyl alcohol in water at 20° C has a density of 0.95g/mL. What weight of alcohol is combined in 750 mL of solution?

Answer 1

Here is yourAnswer.

It is always a problem when a

% concentration

is specified. I get

214

⋅

g

with respect to

ethyl alcohol

.

Explanation:

Do you mean

Mass of solute

Mass of solution

or

Volume (or mass) of solute

Volume of solution

?

Given the context of the question, I ASSUME that you mean.....

Mass of ethyl alcohol

Mass of solution

×

100

%

=

30

%

.

We are further given that..........................

ρ

=

mass of solution

volume of solution

=

0.95

⋅

g

⋅

m

L

−

1

.

And so we work from a

750

⋅

m

L

volume

, which has a mass of

750

⋅

m

L

×

0.95

⋅

g

⋅

m

L

−

1

=

712.5

⋅

g

. Agreed?

And by specification,

30

%

of this mass is

ethyl alcohol

, i.e.

30

%

×

712.5

⋅

g

=

213.75

⋅

g

WITH RESPECT TO

ethyl alcohol

. This is the approx. concentration of a whisky, distilled beer, or a brandy or grappa, distilled wine.

I hope my answer is help you.

B brainly.