What is the most soluble salt of the following set?Group of answer choicesAl(OH)2 with Ksp = 1.9 × 10-33Ca(OH)2 with Ksp = 4.7 × 10-6Fe(OH)2 with Ksp = 4.9 × 10-17Mg(OH)2 with Ksp = 5.6 × 10-12
Question
What is the most soluble salt of the following set?Group of answer choicesAl(OH)2 with Ksp = 1.9 × 10-33Ca(OH)2 with Ksp = 4.7 × 10-6Fe(OH)2 with Ksp = 4.9 × 10-17Mg(OH)2 with Ksp = 5.6 × 10-12
Solution
The solubility of a salt is directly related to its Ksp value. The higher the Ksp value, the more soluble the salt is.
Looking at the given Ksp values:
Al(OH)2 has a Ksp of 1.9 × 10^-33 Ca(OH)2 has a Ksp of 4.7 × 10^-6 Fe(OH)2 has a Ksp of 4.9 × 10^-17 Mg(OH)2 has a Ksp of 5.6 × 10^-12
The salt with the highest Ksp value is Ca(OH)2 with a Ksp of 4.7 × 10^-6. Therefore, Ca(OH)2 is the most soluble salt among the given options.
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