What will be the effect of adding 0.5 mL of 0.1 M HCl to 100 mL of a phosphate buffer in which [H₂PO₄⁻] = [HPO₄²⁻] = 0.35 M? A)The pH will increase slightly. B)The pH will increase significantly. C)The pH will decrease slightly. D)The pH will decrease significantly. E)Since it is a buffer solution, the pH will not be affected.

Question

Quizplus · Accepted Answer

When HCl is added to the buffer solution, it will react with the basic form of the buffer (HS1U1B12S1U1B0POS1U1B14S1U1B0S1U1P1−S1S1P0) to form its conjugate acid form H2S1U1B12S1U1B0POS1U1B14S1U1B0S1U1P1−S1S1P0S1U1P1H. This reaction will decrease the concentration of the basic form of the buffer and increase the concentration of the acidic form of the buffer, causing a slight decrease in the pH of the buffer solution. Therefore, the correct choice is C.

What Will Be the Effect of Adding 0