Multiple Choice
Which of the following salts has the highest molar solubility in water at room temperature?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
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According to general solubility rules, is Li3PO4 (lithium phosphate) soluble in water?
A
Li3PO4 is insoluble in both hot and cold water.
B
Li3PO4 is only soluble in hot water.
C
Yes, Li3PO4 is soluble in water.
D
No, Li3PO4 is insoluble in water.
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 lithium phosphate: Li\(_3\)PO\(_4\) consists of lithium ions (Li\(^+\)) and phosphate ions (PO\(_4^{3-}\)).
According to solubility rules, all alkali metal salts (such as those containing Li\(^+\)) are generally soluble in water regardless of the anion.
Since lithium is an alkali metal, lithium phosphate should be soluble in water despite phosphate salts often being insoluble with other cations.
Therefore, based on these rules, conclude that Li\(_3\)PO\(_4\) is soluble in water.
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