D D How is the pka determined in a titration for the removal of a proton in an acid? It is the pH at the equivalence point It is the initial pH of the acid solution It is the pH halfway between equivalence points O The pKa cannot be determined in a titration Question 4 The volume of sodium hydroxide required to reach the equivalence point is 35.69 mL for a monoprotic acid. What is the volume at which the pka is determined? Report your answer to one decimal place. Question 5 The final equivalence point in the cola titration cannot be determined because the sodium hydroxide pH is too low. True False

Chemistry Question

When 30 .00 mL of 0.1011 M HCl in 50 mL of deionized water is titrated against 0.09889 M NaOH, the pH increases. What is the volume (in mL) of NaOH required to reach the equivalence point and a pH of 7.00? Find the pH when the volume of NaOH added is 0.02 mL less than the volume required to reach the equivalence point. Find the pH when the volume of NaOH added is 0.01 mL less than the volume required to reach the equivalence point. Find the pH when the volume of NaOH added is 0.02 mL more than the volume required to reach the equivalence point. Comment on the significance of the changes in pH values in relation to the increments of sodium hydroxide added when going “through” the end point. Define equivalence point. For a weak base/strong acid titration, is the pH at the equivalence point <, >, or equal to 7?

What would be the molar ratio of cyanic acid (HCNO)/sodium cyanate (NaCNO) buffer having a pH of 4.80 ? [K a(HCNO) = 2.0 × 10 –4]       11.6 mol NaCNO to 1.0 mol HCNO     12.6 mol NaCNO to 1.0 mol HCNO     None of the above     13.6 mol NaCNO to 1.0 mol HCNO     10.6 mol NaCNO to 1.0 mol HCNO