Question

Rate of Chemical reaction Changes
in the presence of a
a Chemical
6) substance
c) catalyst
d) antioxidants​

Answer 1

Answer:

c) catalyst

Explanation:

catalyst speeds up or slows down a chemical reaction

Answer 2

Answer:

During the course of the reaction shown below, reactants A and B are consumed while the concentration of product AB increases. The reaction rate can be determined by measuring how fast the concentration of A or B decreases, or by how fast the concentration of AB increases.

A+B⟶AB(2.5.1)

RateWiki (1).jpg

Figure 2.5.1 : The above picture shows a hypthetical reaction profile in which the reactants (red) decrease in concentration as the products increase in concetration (blue).

For the stochiometrically complicated Reaction:

aA+bB⟶cC+dD(2.5.2)

Rate=−1ad[A]dt=−1bd[B]dt=1cd[C]dt=1dd[D]dt(2.5.3)