Question

What is the mass of ethylene gycol dissolved in 5.00 kg of a 40.0% solution?

Answer 1

40% (by mass) means 40g solute/100 g solution.
40 x (6000/100) = ?

Answer 2

Answer:

3kg

Explanation:

HI friend!

Step 1 -
The Antifreeze solution lowers the freezing point of a water-based liquid.

It is composed of ethyl alcohol(solute) and water(solvent)

Step 2 -
Second, 40% Antifreeze solution means---

40% solute is present in 100 kg of Antifreeze solution.

And here, the solute is ethyl alcohol - 40kg

Step 3-
So, wate(solvent) would become= 100-40 = 60 kg

Therefore we can say that- in 100 kg of Antifreeze solution there is 60 kg water.

Step 4 - (Calculation)
Antifreeze Solution H2O

100 60

5 60/100 * 5 = 3 kg

(The above numerical means that-

If there is 100 kg of the solution, there is 60 kg of water

So, 5kg of the solution, there is 60/100 * 5 = 3kg water)