Question

What is a substance that increases the rate of a chemical reaction but is not itself consumed 1n the reaction?

Answer 1

Answer:

catalyst

Explanation:

It is a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.

Discussion

For chemicals to react, their bonds must be rearranged, because the bonds in the products are different from those in the reactants. The slowest step in the bond rearrangement produces what is termed a transition state - a chemical species that is neither a reactant nor a product, but is an intermediate between the two.

Reactant ⇄ Transition State ⇄ Product

Energy is required to form the transition state. This energy is called the activation energy, or Ea. Reading the diagram below from left to right shows the progress of a reaction as reactants pass through the transition state to become products.

Answer 2

Catalyst

Because :

Temperature-make particles move faster by adding energy to the reactants, which will raise their temperature. 4. Catalyst-some reactions would proceed slowly or not at all without them. a substance that increases the rate of a chemical reaction, but is not itself consumed in the reaction.