Question

What is the final concentration (% v/v) of solution if 8 ml of ethanol is combined with 42 ml of water?

Answer 1

Final concentration (% v/v) of solution = 16%

Step-by-step explanation:

In this problem ethanol is solute and water is solvent and solution is formed by mixing the two.

According to the question,

Volume of ethanol = 8 ml

Volume of water = 42 ml

`\therefore` Volume of solution = Volume of ethanol + Volume of water

= (8 + 42) ml

= 50 ml

By using the formula and inserting the values we get:

`\rm Concentration ( \% v/v) = (Volume \ of \ solute)/(Volume \ of \ solution) * 100 \\ \\ \rm = (8)/(50) * 100 \\ \\ \rm = 8 * 2 \\ \\ = 16 \%`

So, Final concentration (% v/v) = 16%