About what percent of the solution is acid? Round to the nearest hundredth of a percent.

Question

A scientist makes an acid solution by adding drops of acid to 1.2 L of water. The final volume of the acid solution is 1.202 L. Assuming the volume of each drop is 0.05 mL, how many drops were added to the water? About what percent of the solution is acid?

Answer 1

The amount of volume added is 1.202-1.2 = .002 liters x 1000 ml/liter = 2 ml

So, if each drop is .05ml, the amount added is 2 ml/(.05 ml/drop) = 40 drops