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Multiple Choice
Which of the following ionic compounds is not soluble in water?
A
K_2SO_4
B
NH_4Br
C
NaNO_3
D
AgCl
Verified step by step guidance
1
Recall the general solubility rules for ionic compounds in water, which help predict whether a compound will dissolve or not.
Note that compounds containing alkali metal ions (such as K\textsuperscript{+} and Na\textsuperscript{+}) and the ammonium ion (NH\textsubscript{4}\textsuperscript{+}) are generally soluble in water.
Recognize that sulfate (SO\textsubscript{4}\textsuperscript{2-}), bromide (Br\textsuperscript{-}), and nitrate (NO\textsubscript{3}\textsuperscript{-}) ions typically form soluble salts with these cations.
Understand that silver chloride (AgCl) is an exception to solubility because most silver salts are insoluble or only slightly soluble in water.
Therefore, by applying these rules, identify AgCl as the ionic compound that is not soluble in water among the given options.