In determining the concentration of HCL, a student did not realize that the base

Question

In determining the concentration of HCL, a student did not realize that the base in the burette contained an air bubble. Would tyhis result in any error in the determination of your acid concentration? If yes, pick the answer showing how the air bubble would affect the determination of the concentration of the acid.

a. The calculated normality of the acid will be higher than the actual normality.

b. The calculated normality of the acid will be less than the actual normality.

c. There will be no net efect on the calculated normality of the acid.

Explain your answer

Explanation / Answer

b. The calculated normality of the acid will be less than the actual normality.

This is because the the air buble would make the volume of the HCl solution taken in the calculations larger tthan its actual value.

Because normality is calulated as (Molrity_base * volume_base) / (volume_HCl)

an increased volume_HCl would give a smaller value of normality

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