Question

Marryam has a bottle of 5% acetic acid and a bottle of of 10% acetic acid. How much of each should she use to make 250 mL of 8 acetic acid?

Answer 1

Please see the explanation below

Explanation:

Apply a material balance with respect to acetic acid.

Volume of `8%` acetic acid is `V=250ml`

Volume of `5%` acetic acid is `=xml`

Volume of `10%` acetic acid is `=(250-x)ml`

Therefore,

`8/100*250=5/100*x+10/100*(250-x)`

Solving this equation for `x`

`0.05x+25-0.1x=20`

`0.05x=5`

`x=100`

So,

Volume of `5%` acetic acid is `=100ml`

Volume of `10%` acetic acid is `=150ml`