Multiple Choice
In the context of solubility rules, what does it mean when an ionic compound is described as 'soluble' in water?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
Multiple Choice
Which of the following compounds is insoluble in water at 25 °C?
A
NH_4Br
B
AgCl
C
NaNO_3
D
K_2SO_4
Verified step by step guidance1
Recall the general solubility rules for ionic compounds in water at 25 °C. These rules help predict whether a compound will dissolve (be soluble) or not (be insoluble).
Identify the ions in each compound: NH_4Br contains NH_4^+ and Br^-, AgCl contains Ag^+ and Cl^-, NaNO_3 contains Na^+ and NO_3^-, and K_2SO_4 contains K^+ and SO_4^{2-}.
Apply the solubility rules: Ammonium (NH_4^+) salts and nitrates (NO_3^-) are generally soluble in water. Most potassium (K^+) salts are also soluble. Bromides (Br^-) are usually soluble except when paired with certain ions, but NH_4Br is soluble.
Silver chloride (AgCl) is a well-known exception to solubility rules; most silver salts are insoluble except for a few exceptions. AgCl is commonly insoluble in water at 25 °C.
Conclude that among the given compounds, AgCl is insoluble in water at 25 °C, while the others are soluble.
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