Question

Question 3 (1 point)

A buffer solution is made by adding 15.0 mL of a 0.50 M Na₂CO₃ solution to 15.0 mL of a 0.50 M NaHCO₃ solution in a test tube. 2.4 mL of a 1.0 M HCl solution is added to this buffer solution. What is the final pH of the solution in the test tube?

H₂CO₃ has K_a1 = 4.3×10^-7 and K_a2 = 5.6×10^-11.

Question 4 (1 point)

A buffer solution is made by adding 10.0 mL of a 0.50 M Na₂CO₃ solution to 20.0 mL of a 0.50 M NaHCO₃ solution in a test tube. 3.2 mL of a 1.0 M NaOH solution is added to this buffer solution. What is the final pH of the solution in the test tube?

H₂CO₃ has K_a1 = 4.3×10^-7 and K_a2 = 5.6×10^-11.

Answer 1