Distinguish between order of a reaction and molecularity of a reaction?
admin The main difference between the order of a reaction and molecularity of a reaction are given below: ORDER OF A REACTION MOLECULARITY OF A REACTION It is sum of the…
April 2025
What is the difference between photochemical reactions and thermochemical reactions?
Difference between photochemical reactions and thermochemical reactions are discussed below: THERMOCHEMICAL REACTIONS PHOTOCHEMICAL REACTIONS These reactions involve absorption or evolution of heat. These reactions involve absorption of light. They can…
What will be the integrated rate expression of zero order reaction?
Integrated Rate Expression of Zero Order Reaction: Consider the general reaction: A —————-> products If it is a reaction of zero order then, Rate = -d / dt = k…
What is Half Life Period?
Half Life Period is defined as the time taken for half of the reaction to be completed i.e. the time in which the concentration of a reactant is reduced to…
Calculate the order of reaction from two different half values.
Consider the two different initial concentrations and finding their half lives, the order of reaction (n) can be calculated as follows: Taking log on both sides we will get: log…
What will be the amount of the substance left after n half-lives? The half life period of a first order reaction is 60 minutes. What percentage will be left after 240 minutes?
Amount of the substance left after one half life = A0 / 2 Amount of the substance left after two half lives = A0 / 22 Amount of the substance…
Discuss the experimental methods for determination of rate constant.
Experimental methods for determination of rate constant are discussed below: 1. Concentration change method: In this method the concentration of one of the reactants or products is measured at different…
A first order reaction is 40% complete in 50 minutes. Calculate the value of the rate constant. In what time the reaction will be 80% complete?
1) For the first order reaction: k = (2.303 / t) log (a / a – x) When x = (40 / 100) a = 0.4 a t = 50…
What do you mean by pseudo unimolecular reactions?
Pseudo unimolecular reactions: Consider the following acid catalysed reactions: 1. Hydrolysis of ethyl acetate: CH3COOC2H5 + H2O + H+ ———–>CH3COOH + C2H5OH 2. Inversion of cane sugar: C12H22O11 + H2O…
Explain the collision theory.
Collision theory: According to collision theory, a reaction takes place because the molecules collide with each other. The number of collisions that take place per second per unit volume of…