The freezing point of a mixture of water and salt is A. higher than that of pure water
B. the same as that of pure water
C. lower than that of pure water
D. none of the above

A

Explanation:

Because when you mix a mixture and pure substances it’s higher

the answer is c. it will give up it's valence electron to the other atom.

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.