A Titration of 200 $\times$ 10^-5,K_a2 = 3 $\times$ 10^-9

question 77

Multiple Choice

A titration of 200.0 mL of 1.32 M H₂A was done with 1.00 M NaOH.For the diprotic acid H₂A,K_a1 = 2.5 $\times$ 10^-5,K_a2 = 3.1 $\times$ 10^-9.Calculate the pH before any 1.00 M NaOH has been added.

• A)11.76
• B)4.48
• C)9.52
• D)8.96
• E)2.24

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Definitions:

Standard Deviation

A statistical measure of the dispersion or spread of a set of values, indicating how much the values differ from the mean.

Zero Standard Deviation

A statistical measure indicating that all values within a data set are identical; there is no variability.

Average Temperature

The mean value of temperature taken over a specified period of time.

Standard Deviation

A statistical measure that quantifies the variation or dispersion of a set of data points or values from their mean (average).