Table of Contents
What would affect the rate of reaction?
Reactant concentration, the physical state of the reactants, and surface area, temperature, and the presence of a catalyst are the four main factors that affect reaction rate.
How does reactivity affect the rate of a reaction?
Reactivity then refers to the rate at which a chemical substance tends to undergo a chemical reaction in time. For instance, grinding a sample to a higher specific surface area increases its reactivity. In impure compounds, the reactivity is also affected by the inclusion of contaminants.
What decreases the rate of chemical reaction?
temperature
The reaction rate decreases with a decrease in temperature. Catalysts can lower the activation energy and increase the reaction rate without being consumed in the reaction. Differences in the inherent structures of reactants can lead to differences in reaction rates.
How catalyst affect the rate of reaction?
The rate of a reaction can be increased by adding a suitable catalyst. A catalyst is a substance which increases the rate of a chemical reaction but it is not used up (remains chemically unchanged at the end). It provides an alternative reaction pathway of lower activation energy.
Does particle size affect reaction rate?
Decreasing the size of the particles, which make up a given weight, will increase the number of particles represented by the same weight. Smaller particle size results in an increase in the rate of reaction because the surface area of the reactant has been increased.
Which factors decrease the rate of a reaction?
The reaction rate decreases with a decrease in temperature. Catalysts can lower the activation energy and increase the reaction rate without being consumed in the reaction. Differences in the inherent structures of reactants can lead to differences in reaction rates.
How does the concentration of sulphuric acid affect reaction rate?
Figure 1 shows how increasing the concentration of solute increases the amount of effective collisions between the particles, resulting in a greater reaction rate. In this experiment, the independent variable is the change in concentration of the sulphuric acid. The dependant variable is the amount hydrogen gas produced in thirty seconds.
How does pressure affect the rate of a reaction?
Effect of pressure on the rate of‘reaction For reactions with reactants in the form of solid, liquid and aqueous solution, the rates of the reactions do not depend on the pressure. Only for those reactions that involve gaseous reactants, the rates of the reactions will increase when the pressure increases or vice versa.
How does the concentration of solute affect the collision rate?
By increasing the amount of solute in the solution, the collision rate increases, therefore increasing the rate of reaction. Figure 1 shows how increasing the concentration of solute increases the amount of effective collisions between the particles, resulting in a greater reaction rate.