solubility and concentration

Which of the following best describes a precipitate?

• solid powder that falls out of solution when a solid and liquid reactant combine

• solid powder that falls out of solution when two aqueous reactants combine

• solid powder that falls out of solution when aqueous and gaseous reactants combine

AB (aq) + CD (aq) → AD (aq) + CB(s)

Which substance is the precipitate in the reaction above?

• AB

• CD

• AD

• CB

According to the solubility rules (chart), compounds containing Ammonium cations, NH₄⁺ are:

• Not Soluble

• Sometimes Soluble

• Always Soluble

• Always insoluble

According to the solubility rules (reference chart), compounds containing Hydroxide anions, OH^-

• are insoluble when combined with ammonium

• are always insoluble

• are soluble when combined with group 1 elements

• are insoluble when they form compounds with Calcium

Use the Solubility Rules to determine if the following compound is soluble in water:

MgCl₂

• Soluble

• Insoluble

Use the Solubility Rules to determine if the following compound is soluble in water:

CaSO₄

• Soluble

• Insoluble

Use the Solubility Rules to determine if the following compound is soluble in water:

(NH₄)₂CO₃

• Soluble

• Insoluble

Use the Solubility Rules to determine if the following compound is soluble in water:

PbBr₂

• Soluble

• Insoluble

Use the Solubility Rules to determine if the following compound is soluble in water:

HCl

• Soluble

• Insoluble

Use the Solubility Rules to determine if the following compound is soluble in water:

CaS

• Soluble

• Insoluble