Multiple Choice
Which of the following is the correct molecular equation for the reaction between calcium bromide (CaBr2) and silver nitrate (AgNO3) in aqueous solution?
6. Chemical Quantities & Aqueous Reactions
Molecular Equations
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What is the net ionic equation of the reaction of MgSO4 with Pb(NO3)2?
A
Pb^2+ (aq) + SO4^2- (aq) → PbSO4 (s)
B
Pb^2+ (aq) + 2NO3^- (aq) → Pb(NO3)2 (s)
C
MgSO4 (aq) + Pb(NO3)2 (aq) → Mg(NO3)2 (aq) + PbSO4 (s)
D
Mg^2+ (aq) + 2NO3^- (aq) → Mg(NO3)2 (aq)
Verified step by step guidance1
Identify the reactants and products in the given chemical reaction: MgSO4 and Pb(NO3)2 are the reactants, while Mg(NO3)2 and PbSO4 are the products.
Write the balanced molecular equation for the reaction: MgSO4 (aq) + Pb(NO3)2 (aq) → Mg(NO3)2 (aq) + PbSO4 (s).
Determine the states of each compound: MgSO4 and Pb(NO3)2 are aqueous, Mg(NO3)2 is aqueous, and PbSO4 is a solid precipitate.
Break down the aqueous compounds into their respective ions: MgSO4 (aq) dissociates into Mg^2+ (aq) and SO4^2- (aq); Pb(NO3)2 (aq) dissociates into Pb^2+ (aq) and 2NO3^- (aq).
Identify and cancel out the spectator ions that appear on both sides of the equation: Mg^2+ (aq) and NO3^- (aq) are spectator ions. Write the net ionic equation with the remaining ions: Pb^2+ (aq) + SO4^2- (aq) → PbSO4 (s).
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