4.2 Self Assessment - Precipitation Reactions

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

Tags

NGSS.HS-PS1-7

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

• Not Soluble

• Sometimes Soluble

• Always Soluble

• Always insoluble

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

CaCl₂(aq) + 2 AgNO₃(aq) → Ca(NO₃)₂(aq) + 2 AgCl(s)

Which product above is the precipitate?

• CaCl₂(aq)

• AgNO₃(aq)

• Ca(NO₃)₂(aq)

• AgCl(s)

Predict the Products of the double-replacement (precipitate) reaction

MgCl₂(aq) + NaOH(aq) →

• MgCl₂(aq) + NaOH(aq)

• Mg(OH)₂ (s) + NaCl (aq)

• MgNa (s) + ClOH (aq)

• Mg(OH)₂ (aq) + NaCl (s)

Predict the Products of the double-replacement (precipitate) reactions

Pb(NO₃)₂(aq) + MgI₂(aq) →

• Pb(NO₃)₂ (aq) + MgI₂ (s)

• PbI₂ (s) + Mg(NO₃)₂ (aq)

• Pb(NO₃)₂ (s) + MgI₂ (aq)

• PbMg (s) + I(NO₃)₂ (aq)