9) Magnesium hydroxide has a K sp of 2.06 x 10 -13 and Calcium Hydroxide has a K
ID: 1027503 • Letter: 9
Question
9) Magnesium hydroxide has a Ksp of 2.06 x 10-13 and Calcium Hydroxide has a Ksp of 4.68 x 10-6. What happens when sodium hydroxide is added to Magnesium Nitrate and Calcium Nitrate.?
The Magnesium precipitates out first and if there is any hydroxide left the calcium will precipitate.
The Calcium precipitates out first, and if there is any hydroxide left the magnesium will precipitate.
The calcium and the magnesium will precipitate out at the same time.
The hydroxide will dissolve both the magnesium and the calcium.
Explanation / Answer
As the solubility product , Ksp increases the solubility rate will increase. Therefore Calcium will precipitate out firstly then Magnesium will precipitate out.
NaOH+ Mg(NO3)3 > Mg(OH)2 + NaNO3
NaOH + Ca(NO3)2 Ca(OH)2 + NaNO3
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