Question

Parrt A) Do both protons ionize instantaneously from a diprotic acid such as H2CO3?

-No. Polyprotic acids ionize in stages. A small portion of the first protons ionizes (according to Ka1), followed by the second proton ionization (according to Ka2). The second proton can only be lost from the acid molecules that did not lose their first ionizable hydrogen.
- No. Polyprotic acids ionize in stages. A small portion of the first protons ionizes (according to Ka1), followed by the second proton ionization (according to Ka2). The second proton can only be lost from the small number of acid molecules that have already lost their first ionizable hydrogen.

Part B)Which one of the following salts, when dissolved in water, produces the solution with the most basic pH?

Which one of the following salts, when dissolved in water, produces the solution with the most basic pH?

CsCl
CsF
CsBr
CsI

Answer 1

Part A option b

Second proton is lost by only some of those acid molecules who have already lost their 1st proton, so poly proton acids like carbonic acids undergo ionisation in stages

The most basic amongst these caesium halides is caesium iodide CsI. This is because going down the group, atomic size of halogens increase, ionisation enthalpy decreases and ionic character decreases and also bond dissociation enthalpy of iodides is the lowest so it dissolves easier as compared to all others so it is most basic .