Question

A chemist starts with 0.05L of a 0.40M HCl solution and dilutes it to 1.0L. What is the concentration of HCl in the new solution?

a) 0.02M
b) 0.20M
c) 0.40M
d) 0.05M

Answer 1

The concentration of HCl in the new solution is 0.02M. Therefore, the correct option is A.

Step-by-step explanation:

To find the concentration of the new solution, we can use the equation:

(stock concentration) × (stock volume) = final concentration × final volume

In this case, the stock concentration is 0.40 M and the stock volume is 0.05 L. The final volume is 1.0 L. Plugging in these values, we get:

(0.40 M) × (0.05 L) = final concentration × (1.0 L)

Solving for the final concentration, we get:

final concentration = (0.40 M) × (0.05 L) / (1.0 L)

final concentration = 0.02 M