Question

Calculede the concentration
a solution contarning 20 ml
of
alcohol dissolved in 130 m2 of
water​

Answer 1

Answer:

C

2

H

5

OH⟶V

1

=20mL,d

1

=0.7893g/mL

m

1

=15.786g

H

2

O→V

2

=40mL,d

2

=0.9971g/mL

m

2

=39.884g

Totalmass=55.65g

d

sol.

=0.9571g/mL

V

sol.

=58.14mL

%change=

60

60−58.14

×100=3.1%

m=

46×39.884

15.766×1000

=8.6