Why is acid more affective at changing color than temperature?
For my lab experiment, when using acids to demonstrate
CoCl2(H2O)2 + 4 H2O Co(H2O)62+ + 2 Cl-, the color turned from pink to blue. but when heating the pink solution, it turned blue as well. so why are acids more effective than temperature?
For my lab experiment, when using acids to demonstrate
CoCl2(H2O)2 + 4 H2O Co(H2O)62+ + 2 Cl-, the color turned from pink to blue. but when heating the pink solution, it turned blue as well. so why are acids more effective than temperature?
1 Answer
Because you waited while heating?
The reaction you have is backwards. It should be:
#overbrace("Co"("H"_2"O")_6^(2+))^color(pink)"pink" + 2"Cl"^(-)(aq) rightleftharpoons overbrace("CoCl"_2("H"_2"O")_2)^(color(violet)("purple")) + 4"H"_2"O"(l) rightleftharpoons overbrace("CoCl"_4^(2-)(aq))^(color(blue)("blue")) + 6"H"_2"O"(l)#
When you add
When heating the solution, which contains an endothermic reaction, heat is easier to absorb at higher temperatures... so the reaction favors the forward direction and it shifts the reaction to a new equilibrium that favors the bluer product.
Unlike
What would happen if you cool this?
