Problem: Will Ca(OH)2 precipitate from solution if the pH of a 6.0×10−2 M solution of CaCl2 is adjusted to 8.0?

🤓 Based on our data, we think this question is relevant for Professor Lavelle's class at UCLA.

FREE Expert Solution

We are being asked to determine if Ca(OH)2 will precipitate from 6.0×10−2 M solution of CaCl2 when the pH is adjusted to pH 8.0.


We are dealing with a Ksp problem that has a common ion effect

Common ion effect is the effect of the addition of common ions to the equilibrium of a solution.


To solve this problem, we will use the reaction quotient.

The reaction quotient, Q, is used to determine if our chemical reaction is at equilibrium.


Depending on if Q is greater than or less than K our reaction will shift to attain equilibrium by reaching the equilibrium constant K. 

The direction our reaction shifts determines whether our reactants or products are increasing or decreasing.

If K = Q, the reaction is. at equilibrium.

If K>Q, the reaction shifts in the forward direction to reach equilibrium.

If K<Q, the reaction shifts in the reverse direction to reach equilibrium.


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Problem Details

Will Ca(OH)2 precipitate from solution if the pH of a 6.0×10−2 M solution of CaCl2 is adjusted to 8.0?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Selective Precipitation concept. If you need more Selective Precipitation practice, you can also practice Selective Precipitation practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Lavelle's class at UCLA.