# Higher Chemical Concentration = Higher Temperature of Precipitation. Why?

1. Mar 24, 2007

If two chemicals are mixed together, say: $$Na_2SO_4 + CaCl_2 --> 2NaCl + CaSO_4$$

If I had varying concentrations of the reactant solutions, why is it that the higher concentration mixtures will precipitate at a higher temperature? and lower concentration chemicals will precipitate at a lower temperature?

2. Mar 25, 2007

### mrjeffy321

Think about how solubility is affected with a change in temperature.
In what situation (higher or lower temperature) will more solute (NaCl and CaSO4) dissolve in the water?

3. Mar 31, 2007

### ctaconquer

what?

Can u explain more clearly

4. Mar 31, 2007

### Ahmed Abdullah

As temperature increases solublity of both products increases. But solublity decreases when concentration is increased. At any temperature it is more likely that higher concentration will yield higher precipitation.

5. Mar 31, 2007

### ctaconquer

Thx

So by increasing concentration we are increasing the solubility. By increasing solubility we are lowering the temperature at which the precipitation occurs?

Do you know any website that has the theory behind this?

thx for the reply