Multiple Choice
When copper(II) sulfate (CuSO_4) is dissolved in water, what can be said about its solubility according to common solubility rules?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
Multiple Choice
Which of the following chemical equations represents a precipitation reaction?
A
NaCl(aq) + AgNO3(aq) → AgCl(s) + NaNO3(aq)
B
CO2(g) + H2O(l) → H2CO3(aq)
C
KNO3(aq) + NaCl(aq) → KCl(aq) + NaNO3(aq)
D
HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)
Verified step by step guidance1
Step 1: Understand what a precipitation reaction is. A precipitation reaction occurs when two aqueous solutions react to form an insoluble solid called a precipitate.
Step 2: Identify the physical states of the reactants and products in each equation. Look for a solid (s) forming from aqueous (aq) reactants.
Step 3: Analyze the first equation: NaCl(aq) + AgNO3(aq) → AgCl(s) + NaNO3(aq). Here, AgCl is a solid precipitate formed from two aqueous solutions, indicating a precipitation reaction.
Step 4: Check the other equations: the second produces H2CO3(aq) (aqueous), the third only rearranges aqueous ions without forming a solid, and the fourth is an acid-base neutralization producing water and aqueous salt, not a precipitate.
Step 5: Conclude that the equation with AgCl(s) as a product represents a precipitation reaction because it forms an insoluble solid from aqueous reactants.
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