To prepare 70 ml of a 10% solution of acetic acid,how much acetic acid is needed?

Question

Quizplus · Accepted Answer

To prepare 10% solution, we need to dissolve 10 g of acetic acid in 100 ml of the solution (10% of 100 ml is 10 ml). 
So, to prepare 70 ml of the 10% solution, we need:

(10 g / 100 ml ) x 70 ml = 7 g

However, we need to convert grams to milliliters because the final unit required is ml. 
The density of acetic acid is 1.049 g/ml at room temperature.

Volume of acetic acid needed = 7 g ( 1 ml / 1.049 g)

= 6.66 ml

Hence, the correct answer is (B) 7 ml.

To Prepare 70 Ml of a 10% Solution of Acetic