A catalyst is a substance which speeds up the rate of reaction. After the reaction it remain chemically unchanged. It does NOT affect the position of equilibrium. There can also be negative or "poisoned" catalysts as in Rosenmunds reaction.
When we take the mechanisam of a reaction in most cases the catalyst involves in reaction to initiate the reaction but finally the catalyst is regained by this way it alters the rate of reaction
They make it run faster at even the same temperature.
A catalyst improve the rate of a chemical reaction.
Catalysts speed up reactions by reducing the activation energy.
catalyst
A catalyst increases the reverse rate of the reaction
Assuming you mean rate of reaction. The factors are particle size, concentration, temperature and catalyst. The smaller the particle size the bigger the surface area exposed, so more particles are available for reactions to occur. The higher the concentration the more particles present so more reactions take place. The higher the temperature the faster the particles move around so there are more frequent reactions between particles. Having a catalyst present speeds up a reaction without the catalyst being used up.
An enzyme is the biological catalyst that speeds up chemical reactions.
Whether a catalyst is present or not, Concentrations of reactants, Temperature, Pressure (but this is least likely to affect rate)
Catalysts speed up reactions by reducing the activation energy.
a catalyst speeds up the rate of reaction
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catalyst
A catalyst increases the reverse rate of the reaction
Assuming you mean rate of reaction. The factors are particle size, concentration, temperature and catalyst. The smaller the particle size the bigger the surface area exposed, so more particles are available for reactions to occur. The higher the concentration the more particles present so more reactions take place. The higher the temperature the faster the particles move around so there are more frequent reactions between particles. Having a catalyst present speeds up a reaction without the catalyst being used up.
An enzyme is the biological catalyst that speeds up chemical reactions.
enzymes are the catalyst that aid the reactions taking place inside our bodies. if there were no enzymes, our metabolic processes would slow down to such a rate that we would not be able to survive.
If your question is "What affects catalyst performance?" (i.e. what stops them from working) then there are 2 main things: Atoms permanently bonded to the surface, blocking it, and so that stops other reactant molecules from sticking to it (catalyst poisoning) Catalyst sintering: This can be seen on high temperature solid metal catalysts, where there is a gradual loss of surface area for reactant molecules to stick to as a result of the individual catalyst surface atoms combining together (due to the heat) to make one big blob of lower surface area
A catalyst speeds up the reaction and lowers the amount of heat needed.
5 factors that can affect the rate of chemical reactions are temperature, pressure, concentration, stirring, catalysts.