5. Classification & Balancing of Chemical Reactions

Predict whether a chemical reaction occurs and write the balanced molecular equation.

Ag₂SO₄ (aq) + KCl (aq) →

Predict whether a chemical reaction occurs and write the balanced molecular equation.

MgBr₂ (aq) +  NaC₂H₃O₂ (aq) →

Determine the balanced equation for the neutralization equation

Ca(OH)₂ (aq) + HCN (aq) →

An aqueous solution of a cation (represented as blue spheres in the diagram) is allowed to mix with a solution of an anion (represented as green spheres) and the following result is obtained:

Which combinations of cation and anion, chosen from the following lists, are compatible with the observed results? Explain.

Cations: Na⁺, Ca²⁺, Ag⁺, Ni²⁺

Anions: Cl⁻, CO₂^3–, CrO₄^2–, NO₃^–

Write a balanced equation for the neutralization of each of the following:

c. HNO₃(aq) and Mg(OH)₂(s)

Write the balanced chemical equation for the neutralization reaction of stomach acid HCl with Al(OH)₃, an ingredient in some antacids.

Many pharmaceuticals are marketed with the designation "HCl" appended to the name of the drug. What does the "HCl" mean? What type of reaction would be involved in converting a drug to the HCl form? What are the advantages of this form of the drug?