Chemistry Past Questions and Answers

PCl_5(g) ↔ PCl_3(g) + Cl_2(g)
In the reaction above, a decrease in pressure will

When H2S is passed into a solution of iron (III) chloride, the solution turns

The Arrhenius equation expresses the relationship between the speed of a reaction and its

When dissolved in water, NaOH flakes show

CU₂S_(s) + O_2(g) → 2CU_(s) + SO_2(g)
What is the change in the oxidation number of copper in the reaction above?