Speed of reaction Mini Part 1
Source:Simple Chem Concepts
Note:If anyone wants the other two parts pls comment and tell me.

Different chemical reactions take place at different speeds.
The amount of reactants and products change during a chemical reaction.
We can measure the speed of reaction by measuring:
– how quickly a product is formed per unit time
– how quickly a reactant is used up per unit time

Speed of Reaction = (Change in Amount of Reactant/Product) / time taken
Or (for reaction that produces a Gas),

Speed of Reaction = (Change in Volume of Gas) / time taken

We often see questions in exams relating to RATE GRAPHS - A graph obtained by plotting some measurable quantity (e.g, volume of carbon dioxide produced or loss in mass of flask & contents in the reaction between limestone & hydrochloric acid) against time in order to find the rate of reaction.



Gradient of tangent to any point on the curve

–> Rate of Reaction at any instant
Steeper the gradient

–> faster the reaction
At start of reaction, graph is the steepest

–> Rate at the start of ANY reaction is always Fastest
As reaction progresses, gradient becomes gentler

–> Reaction is Slowing Down
After sometime, the graph levels off

–> point of leveling off signifies the End of Reaction
Let’s check out a question on Rate Graphs!


The answer is A

lol....doing ur chem work here...nice

Hahaha...chemistry is too dificult as compared to maths and phy.

yr chem is quite easy....its just how early u get hold of it

Yep......i agree with you