Question

In a school’s laboratory, students require 50.0 mL of 2.50 M H2SO4 for an experiment, but the only available stock solution of the acid has a concentration of 18.0 M. What volume of the stock solution would they use to make the required solutionA. 0.900 mL

B. 1.11 mL
C. 6.94 mL
D. 7.20 mL

Answer 1

Answer: The volume of stock solution of acid required 6.94 mL.

Step-by-step explanation:

To calculate the volume of stock solution, we use the equation given by neutralization reaction:

`M_1V_1=M_2V_2`

where,

`M_1\text{ and }V_1` are the molarity and volume of acid which is
`H_2SO_4`

`M_2\text{ and }V_2` are the molarity and volume of stock solution of acid.

We are given:

`M_1=2.50M\\V_1=50.0mL\\M_2=18.0M\\V_2=?`

Putting values in above equation, we get:

`2.50M* 50.0mL=18.0M* V_2\\\\V_2=6.94mL`

Hence, the volume of stock solution of acid required 6.94 mL.