Multiple Choice
Given that the solubility product constant (K_sp) for Ca(OH)_2 at 25°C is 5.5 × 10^{-6}, what is the molar solubility of Ca(OH)_2 in pure water?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
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According to general solubility rules, which of the following compounds is most likely to be soluble in water?
A
BaSO_4
B
PbSO_4
C
NaNO_3
D
AgCl
Verified step by step guidance1
Recall the general solubility rules for ionic compounds in water, which help predict whether a compound will dissolve or remain mostly solid.
Identify that most nitrates (NO_3^-) are soluble in water without exceptions, so compounds containing the nitrate ion, such as NaNO_3, are generally soluble.
Recognize that sulfates (SO_4^{2-}) are usually soluble, but exceptions include BaSO_4 and PbSO_4, which are known to be poorly soluble or insoluble in water.
Note that most chlorides (Cl^-) are soluble, but silver chloride (AgCl) is an important exception and is considered insoluble or sparingly soluble in water.
Conclude that among the given compounds, NaNO_3 is the most likely to be soluble in water based on these solubility rules.
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