Question

1. Without doing a calculation, predict which of these compounds has the greatest molar solubility in water: AgCI (Ksp=1.8x10-10), AgBr (Ksp 5.0x10-13), or AgI (Ksp=8.3x10-17). Optional Answers: 1. AgI is the most soluble of the three. 2. AgBr is the most soluble of the three. 3. AgCl is the most soluble of the three 4. All of the compounds are totally insoluble based on their small Ksp values. 2. Why is the sulfide reagent HS- in the third test tube and not H2S? Optional Answers: 1. Because the solution is basic. 2. Because the solution is acidic 3. Because the solution is neutral 3. An aqueous solution contains a soluble compound of either silver, barium, or copper. If a precipitate forms when HCI is added to the solution, which ion must be present? Optional Answers: 1. Copper, because CuCl2 is relatively insoluble. 2. Copper and silver, because CuC12 and AgCl are BOTH relatively insoluble. 3. Barium, because BaCl2 is relatively insoluble. 4. Silver, because AgCl is relatively insoluble.

I need help with these 3 questions. Any explanation would be great too! Thank you!

Answer 1

ANS-1.Ksp (Solubility product constant) is the equilibrium between a solid and its respective ions in a solution. The value of the constant identifies the degree of which the compound can dissociate in water. For example the higher the Ksp the more soluble the compound is[ AgCl would have more value of Ksp so ,3. AgCl is the most soluble of the three]

ANS-2.HS⁻ is the Brønsted-Lowry base,. The HS⁻ has become H₂S. It has one more H atom. HS^- required one proton,so we want acidic solution [ 2.Because the solution is acidic]

ANS-3.When Ag⁺ combine with HCl to give white precipitate of AgCl[ 4. silver ,because AgCl is relatively insoluble] THANK YOU VERY MUCH,GOOD LUCK