Ionization equation:

CaSO4 = & ltCa & gt2++ & lt； SO4 & gt2-(= reversible symbol)

Solubility product constant ksp = c (

Potassium bisulfate (

c(& lt； SO4 & gt2-) writing will inevitably lead to C (

Pb (Ⅳ) has strong oxidation, so I'm afraid that PbCl4 _ 4 _ 4 can't exist stably in solution, and it may be transformed into Pb (Ⅱ).

PbCl4 ―→ PbCl2 + Cl2↑

According to the same ion effect, adding related ions can promote the reverse movement of ionization balance, and ions can be transformed into precipitation.

Barium sulfate is more insoluble in water than calcium sulfate, and its solubility product constant is smaller. It stands to reason that the reaction should be more sensitive by using the same ion effect.