25mL of ethanol (C2H3OH) is diluted to a volume of 150mL with water.

What is the concentration (in % v/v) of the following solution?

Question

25mL of ethanol (C2H3OH) is diluted to a volume of 150mL with water.

What is the concentration (in % v/v) of the following solution?

zepp · Answer

Total: 25+150 = 175ml
Percentage V/V = 25/175 * 100 $\approx$ 14.2857%

zepp · Answer

It mean that 14.2857% of every 175ml of this solution is ethanol.

zepp · Answer

Like beers, e.g.: 5% alcool mean that there's 5ml of pure alcohol in 100ml of water. So there's 5ml of alcohol and 95ml of water.

anonymous · Answer

That clarifies a lot. Thanks so much!

zepp · Answer

You are welcome :)

zepp · Answer

Forget my blahblah, I got mixed up again.

zepp · Answer

Concentration % V/V = Quantity of the product / Quantity of the solution

zepp · Answer

There
Quantity of the product : 25ml
Quantity of the solution: 150ml + 25ml = 175

Sorry for the confusion :(

anonymous · Answer

No big deal! thank you for the help!