How does concentration change the speed of reaction?

Answer 1

1. Raising the temperature of reactants will speed up a chemical reaction as it make the achievement of the Activation Energy easier. The temperature of individual atoms/molecules in a gas or liquid follow a normal distribution. Raising the temperature forces more atoms/molecules into the 'reaction worthy' side of the distribution.
2. Sneeky energy pumping. Provide some kind of energy that doesn't raise the temperature but does break-down reactant into more reactive radicals. (light, electric discharge) See the photo-electric effect
3. Introduce enzymes. Chemicals that aren't consumed in the chemical reaction but provide a lower energy way for the reaction to proceed.
4. Poisons react opposite to enzymes by inhibiting a lower energy alternative and forcing a higher energy path for the reaction.

Take is easy,,,,,catalyst increase the rate of chemical reaction and inhibitor decrease it...

Answer 2

Imagine an exposed iron nail. If it is exposed to a weak concentration of vaporized water, the oxidation process of the iron is slow. If the concentration of water vapor is higher, the oxidation process speeds up to a certain point, hastening the rusting process of the nail.

Answer 3

An increase in concentration marks an increase in rate of reaction. Reactions are determined by how molecules collide, the frequency, and geometry. Even if two molecules react with each other, they may not if they do not collide in the correct way. For example, the polar ends may not line up and there is no attraction to form new compounds. By increasing the concentration, the frequency of collisions between particles goes up. The rate of reaction will increase because more molecules are involved and there is a greater chance that molecules will align.

Answer 4

The rate of a chemical reaction depends on: temperature, pressure, concentration of reactants, physical form of reactants, catalysts, stirring, nature and order of the reaction, solvent, effect of irradiation, etc.