I had KNO3. before cooling, there was a single KNO3 crystal at the bottom of the colorless solution. After cooling in an ice bath, lots more crystals of KNO3 formed.
Would you say lowering the temp affected the equilibrium? I'm pretty sure it did, im just not sure why...
2007-03-20 01:23:18 · 4 answers · asked by Tracey Lee ♥ 2 in Science & Mathematics ➔ Chemistry
lowering the temperature lowered the kinetic energy of the solution. This would lower the solubility of KNO3 in solution so you still have an equilibrium but you have it with more solid KNO3 and less in solution.
2007-03-20 01:27:00 · answer #1 · answered by flteacherdude 2 · 0⤊ 0⤋
Lowering the temperature causes the kinetic energy of the molecules to decrease and hence, crystals formed.
KNO3(aq) -----> KNO3(s) ΔH = negative
Formation of solid KNO3 liberates heat. When KNO3 is cooled in an ice bath, the temperature of the solution goes down. This causes the equilibrium between the solid and KNO3 solution to be disturbed. In order to reachieve equilbrium of the system, more heat should be released. Hence, equilibrium of the system shifts to right, causing more crystals of KNO3 to form.
Hope it helps.
2007-03-20 01:39:59 · answer #2 · answered by Adrianne G. 2 · 0⤊ 0⤋
in my opinion,'cause chemical equilibrium is a reaction process to release or take in heat.
u did a good job.the experiment u did will help u have a better idea of equilibrium process.i admired for what u did.
2007-03-20 01:51:56 · answer #3 · answered by the little Gerry 2 · 0⤊ 0⤋
lowering the temp reduced the solubility of the solution.
2007-03-20 01:30:10 · answer #4 · answered by danili 3 · 0⤊ 0⤋