What Factors Affect the Rate of A Chemical Reaction?

A chemical reaction is a common word for a chemical synthesis lab. In chemistry, there are many chemical reactions. Different chemical reactions produce different reactants. But there are also some common points regarding these reactions, like the factors that affect the rate of a chemical reaction. Then here comes the question: what factors affect the rate of a chemical reaction? Come and see our analysis below.What Factors Affect the Rate of A Chemical Reaction1 (1)

Factors that affect the rate of a chemical reaction — general introduction

1.Internal factors: the structure and properties of the substances participating in the reaction.
2.External factors: mainly refers to concentration, temperature, pressure, and catalyst, in addition to light, ultrasound, laser, stirring, solid surface area, the formation of galvanic cells, etc.

Factors that affect the rate of a chemical reaction — detailed analysis

When talking about such influencing factors, we usually refer to external factors. There are mainly four factors that affect the rate of a chemical reaction regarding the external part.

(1) Concentration: Generally speaking, increasing the concentration of gas and liquid will speed up the reaction rate. The reaction of solid matter is related to the surface area of contact, so the mass of solid matter cannot be used to express the concentration. In general, the concentration of a solid substance at a certain temperature is regarded as constant, and the concentration of a pure liquid should also be regarded as constant.

(2) Temperature: the number 2 of the four factors that affect the rate of a chemical reaction is temperature. When other conditions are the same, increasing the temperature can speed up the reaction rate. According to the experiment, the chemical reaction rate usually increases by 2 to 4 times for every 10°C increase in temperature.

(3) Pressure: in a reaction involving gas, when the temperature remains constant, the pressure of the gas is proportional to the concentration. Increasing the pressure has the same effect as increasing the concentration of the reactant, thereby accelerating the reaction rate. If the substance participating in the reaction is a solid, liquid, or solution, changing the pressure will change its volume very little, so its concentration will change very little. It can be considered that the change of pressure does not affect their reaction rate.

(4) Catalyst: the last one of the four factors that affect the rate of a chemical reaction is the catalyst. A catalyst is a substance that can change the rate of a chemical reaction, but its quality and chemical properties remain unchanged before and after the reaction. For some chemical reactions, the use of positive catalysts can significantly accelerate the rate of chemical reactions.

Factors that affect the rate of a chemical reaction — summary

The four influencing factors mentioned above are the main, but there are also some other factors that may influence the reaction rate. For example, the surface area of the solid (you can turn the solid block into powder to increase its surface area thus improving the reaction rate); light, (light can generally increase the rate of some reactions); ultrasonic waves, radiation, electromagnetic waves, etc. As a company offering custom synthesis services, we need to summarize these factors and consider these factors more when doing experiments in the future, so that our chemical experiments can be completed more smoothly.