How much mass do 2.0 moles of uranium contain

pH=pKa

pH=4.44

Explanation:

Since the titration occur between a weak acid and a strong base.

then at half -equivalence point, the pH of the solution is equals to the pKa of the weak acid.

Therefore, pH=pKa

Ka of weak acid=3.6×10^−5

To calculate the pKa of the weak acid using the express below;

pKa =- log(Ka)

pKa=−log(3.6×10−5)=4.44

From the question, the pKa of the solution is at half -equivalence point

Then,

pH=pKa

pH=4.44