In which of the following solutions would solid PbBr₂ be expected to be the least soluble at 25 °C? A) 0.1 mol L^-1 H Br B) 0.1 mol L^-1 NaBr C) 0.1 mol L^-1 CaBr₂ D) 0.1 mol L^-1 KNO₃

Question

Quizplus · Accepted Answer

In general, the solubility of a salt will increase as the size and charge of the cation increase. Therefore, the larger cations Ca2+ and K+ in options C and D, respectively, will make the corresponding salts more soluble than the smaller Na+ and H+ cations in options A and B. Additionally, the anions in all options are the same (Br-), so the only factor affecting solubility is the cation. Therefore, the solution containing CaBr2 should result in the least soluble PbBr2 due to the larger size and charge of the Ca2+ cation.

In Which of the Following Solutions Would Solid PbBr2 Be

In Which of the Following Solutions Would Solid PbBr₂ Be