Multiple Choice
Which of the following pairs of solvents are miscible?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
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Which of the following compounds is insoluble in water?
A
AgCl
B
NH_4Br
C
NaNO_3
D
K_2SO_4
Verified step by step guidance1
Recall the general solubility rules for ionic compounds in water, which help predict whether a compound will dissolve or not.
Identify the ions in each compound: AgCl contains Ag⁺ and Cl⁻; NH₄Br contains NH₄⁺ and Br⁻; NaNO₃ contains Na⁺ and NO₃⁻; K₂SO₄ contains K⁺ and SO₄²⁻.
Apply the solubility rules: Most nitrates (NO₃⁻) and ammonium (NH₄⁺) salts are soluble, as are most potassium (K⁺) salts. Sulfates (SO₄²⁻) are generally soluble except with certain cations, but potassium sulfate is soluble.
Note that silver chloride (AgCl) is an exception to the solubility of chlorides; it is known to be insoluble or sparingly soluble in water.
Conclude that among the given compounds, AgCl is insoluble in water based on these solubility rules.
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