Simple answer: When a reaction occur change in the concentrations of reactants or products per unit of time is called reaction rate .
Scientific answer: The reaction rate (rate of reaction) or speed of reaction for a reactant or product in a particular reaction is intuitively defined as how fast or slow a reaction takes place. for example, the oxidative rusting of iron under the atmosphere is a slow reaction that can take many years, but combustion of cellulose in a fire is a reaction that takes place in fractions of a second.
Reaction rate is a measure of how quickly a chemical reaction occurs. It can be quantified by the rate at which reactants are consumed or products are produced over time. Factors such as temperature, concentration of reactants, and presence of catalysts can influence the reaction rate.
Rate of reaction is the speed at which a chemical reaction is taking place. Reactions do not progress at a constant speed (usually). The rate is generally dependent on the amount of one or more reactants remaining in the system.
the change in concentration of a reactant or product per unit of time , generally calculated and expressed in moles per liter per second.
The product and reactants reach a final, unchanging level.
The effect of concentration of reactants on rate of reaction depends on the ORDER of the reaction. For many reactions, as the concentration of reactants increases, the rate of reaction increases. There are exceptions however, for example a zero order reaction where the rate of reaction does not change with a change in the concentration of a reactant.
if reaction is exothermic then on heating rate of reaction wil be low,and if reaction is endothermic then rate of reaction wil be high on heating
Equilibrium at this point means that the forward reaction and the backward reaction are taking place at the same rate. The formation of the products and the reactants are at equal rate.
In general, and depending on the order of the reaction, the rate will decrease as the reaction progresses.
The measure is the rate of reaction.
The chemical term is reaction rate.
The product and reactants reach a final, unchanging level.
The effect of concentration of reactants on rate of reaction depends on the ORDER of the reaction. For many reactions, as the concentration of reactants increases, the rate of reaction increases. There are exceptions however, for example a zero order reaction where the rate of reaction does not change with a change in the concentration of a reactant.
if reaction is exothermic then on heating rate of reaction wil be low,and if reaction is endothermic then rate of reaction wil be high on heating
An expression relating the rate of a reaction to the rate constant and the concentrations of the reactants
Equilibrium at this point means that the forward reaction and the backward reaction are taking place at the same rate. The formation of the products and the reactants are at equal rate.
In general, and depending on the order of the reaction, the rate will decrease as the reaction progresses.
The rate of a reaction is calculated using the concentrations of reactants.
With a catalyst the reaction rate is higher.
Stirring improve the reaction rate.
Heat can change the rate of reaction