# What are the 4 factors that affect the rate of reaction PPT?

The factors that affect the rate of a chemical reaction are : nature of reactants, temperature, concentration, size of particle and catalyst. The rate of reaction is the speed at which a reaction proceeds.

## How do you calculate reaction?

The rate of a reaction can be calculated by dividing the change in the amount of reactant or product by the time taken, as shown in the equation below. The amount of reactant lost or product gained can be measured by recording the mass in grams (for solids) or the volume in cm 3 (for liquids).

## What is meant by rate of reaction?

reaction rate, in chemistry, the speed at which a chemical reaction proceeds. It is often expressed in terms of either the concentration (amount per unit volume) of a product that is formed in a unit of time or the concentration of a reactant that is consumed in a unit of time.

## What are the 5 factors that affect the rate of reaction?

We can identify five factors that affect the rates of chemical reactions: the chemical nature of the reacting substances, the state of subdivision (one large lump versus many small particles) of the reactants, the temperature of the reactants, the concentration of the reactants, and the presence of a catalyst.

## Why does the rate of reaction increases with temperature?

An increase in temperature typically increases the rate of reaction. An increase in temperature will raise the average kinetic energy of the reactant molecules. Therefore, a greater proportion of molecules will have the minimum energy necessary for an effective collision (Figure.

## What is the formula to find rate?

A rate law shows how the rate of a chemical reaction depends on reactant concentration. For a reaction such as aA → products, the rate law generally has the form rate = k[A]ⁿ, where k is a proportionality constant called the rate constant and n is the order of the reaction with respect to A.

## What is unit of rate of reaction?

The unit of rate of reaction is Molar/Second since rate is the change in concentration in a given time interval.

## How do you calculate rate of reaction from a graph?

Rate Graphs 2 Draw a tangent to the curve of where you want to find that rate of reaction. Pick two points on that tangent line. Work out the difference in the y-coordinates of the two points you picked. Work out the difference in the x-coordinates of the two points you picked.

## What are the types of rate of reaction?

• The concentration of the reactants. The more concentrated the faster the rate.
• Temperature.
• Physical state of reactants.
• The presence (and concentration/physical form) of a catalyst (or inhibitor).
• Light.

## What is a zero-order reaction?

Definition of zero-order reaction : a chemical reaction in which the rate of reaction is constant and independent of the concentration of the reacting substances — compare order of a reaction.

## Why do adding catalyst increase the rate of reaction?

A catalyst increases the rate of reaction in a slightly unconventional way from other means of increasing reaction rate. The role of a catalyst is to lower the activation energy so that a greater proportion of the particles have enough energy to react.

## What is a catalyst in chemistry?

A catalyst is a substance that speeds up a chemical reaction, or lowers the temperature or pressure needed to start one, without itself being consumed during the reaction. Catalysis is the process of adding a catalyst to facilitate a reaction.

## What is the relationship between temperature and reaction rate?

Increasing the temperature increases reaction rates because of the disproportionately large increase in the number of high energy collisions. It is only these collisions (possessing at least the activation energy for the reaction) which result in a reaction.

## How does pressure affect the rate of reaction?

Pressure. If the pressure of gaseous reactants is increased, there are more reactant particles for a given volume. There will be more collisions and so the reaction rate is increased. The higher the pressure of reactants, the faster the rate of a reaction will be.

## Which reaction increases with temperature?

The rate, therefore, generally increases with increasing temperature. We can see from Arrhenius’ equation that the rate of all reactions increases with increase in temperature irrespective of the fact whether they are exothermic or endothermic. Hence, the correct answer is Option (A) any reaction.

## How do you calculate initial rate of reaction?

The initial rate of a reaction is the instantaneous rate at the start of the reaction (i.e., when t = 0). The initial rate is equal to the negative of the slope of the curve of reactant concentration versus time at t = 0.

## How do you find the rate constant of a first order reaction?

Because this equation has the form y = mx + b, a plot of the natural log of [A] as a function of time yields a straight line. The rate constant for the reaction can be determined from the slope of the line, which is equal to -k.

## How do you find the rate constant k?

(It’s also the easiest method for zero-order reactions since the rate of the reaction is equal to the rate constant!) The dependence of the rate constant on temperature is well defined by the Arrhenius equation: k = A * exp(-E /(R * T)) .

## Is rate of reaction always constant?

Rate of reaction does not remain constant during the complete reaction because rate depends upon the concentration of reactants which decreases with time.

## Why is 1 time a measure of the rate of reaction?

If a reaction takes less time to complete, then it’s a fast reaction. 1/t just gives a quantitative value to comparing the rates of reaction. Obviously the one that finished in less time is quicker, 3 times quicker, which is shown by 1/t.