Chemistry Paper 2

Question 1

reading rate from a graph

Answer 1

on a reactants used or products formed / time graph, the gradient is indicative of the rate of reaction

Question 2

why does rate of reaction slow down

Answer 2

at the start, there are many reactant molecules so there are more frequent successful collisions however as this reduces, so does the frequency of successful collision

Question 3

finding the rate of reaction at a certain point on a graph

Answer 3

use a tangent.

Question 4

collision theory

Answer 4

chemical reactions can only take place when particles collide with each other with sufficient energy
- frequency of successful collisions determines rate of reaction

Question 5

effect of concentration on rate of reaction

Answer 5

higher concentration = higher rate of reaction
conc. is directly proportional to RoR

Question 6

turbidity

Answer 6

the cloudiness of a solution

Question 7

RP5 : rate of reaction

Answer 7

https://www.youtube.com/watch?v=N5p06i9ilmo