Quote Originally Posted by albada View Post
Temperature was 30C (summer and no A/C), but I think temperature does not affect the rate of precipitation-reactions, so the times below probably won't change with temperature.
Temperature affects the rates of ALL reactions.

The rule of thumb is that for every 10C increase in temperature, the reaction rate doubles. So a reaction at 30C will be twice as fast as one at 20C.

Also, for precipitation, temperature affects solubility, so that affects the concentration that precipitation begins.

Rule of thumb, solids are more soluble in water as the temperature increases. (The opposite is true for gases dissolved in water.)