Question

In chemistry class, MR. mr Flores prepared a solution by adding 270ml of solute to make a 800ml are of solution what is the concentration of the solute and percent by volume

GIVEN:

UNKNOWN:

FORMULA:

SOLUTION:

ANSWER:​

Answer 1

Answer:

Since ethylene glycol is in excess, it is a solvent and water is a solute.

The molar mass of water is 18 g/mol.

Number of moles of solute =

18

200

=11.11 moles

Molality is the number of moles of solute in 1 kg of solvent.

222.6 g of ethylene glycol corresponds to 0.2226 kg.

Molality =

0.2226

11.11

=49.9 m

Total mass of solution =222.6+200=422.6 g

Density of solution =1.072 g/mL

Volume of solution =

Density

Mass

=

1.072

422.6

=394 ml or 0.394 L

Molarity is the number of moles of solute in 1 L of solution.

Molarity =

0.394

11.11

=28.2 M