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A reactant is the starting material of a reaction.

For example, in the reaction 2H(+) + O(2-) --> H2O, both H(+) ions and the O(-) ion are the reactants, whereas H2O is the product of the reaction.

A reactant is something that REACTS.

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After a chemical reaction starts when will a chemical reaction end?

When the limiting reactant is completely used up. A limiting reactant is the reactant that determines the amount of product. To determine this use the balanced chemical reaction with the masses of the reactants to determine the moles of product formed. The reactant that forms the least amount of product will be the limiting reactant.


A substance that undergoes change in a chemical reaction is called a what?

A substance that undergoes change in a chemical reaction is called a reactant. Reactants are the starting materials in a chemical reaction that are transformed into products through the rearrangement of atoms.


What is the substance present at the start of a reaction?

The substance present at the start of a chemical reaction is called a reactant. Reactants are the starting materials that undergo chemical changes to form products during a reaction.


Define limiting reactant?

In a chemical reaction the limitting reactant is also know as limiting reagent.it is the substance which is totally consumed when the chemical reaction is complete.the reacton can not proceed without it.


If the order of a chemical reaction with respect to one of its reactants is zero how does that reactant's concentration affect the rate of the chemical reaction?

If the order of a reactant is zero, its concentration will not affect the rate of the reaction. This means that changes in the concentration of the reactant will not change the rate at which the reaction proceeds. The rate of the reaction will only be influenced by the factors affecting the overall rate law of the reaction.

Related Questions

What is the difference between a reaction and products of a chemical reaction?

reactant + reactant = product


Why is a catalyst not a product or reactant of a chemical reaction?

If a substance is a reactant or product of a chemical reaction then, by definition, it cannot be a catalyst.


Why is a catalyst not a product or a reactant of a chemical reaction?

If a substance is a reactant or product of a chemical reaction then, by definition, it cannot be a catalyst.


What is the reactant in the chemical reaction of respiration?

endothermic reaction


How are reactant elements or molecules different than the compound produced in a chemical reaction?

reactant elements and molecules are used in a chemical reaction, they are not mixed or combined or produced in a chemical reaction.


What is an element or compound that enters into a chemical reaction?

A reactant is a substance that enters into a chemical reaction and is transformed into a new product. It is present at the start of the reaction and gets consumed during the process.


What is the definetions of limiting reactant in chemistery?

In a chemical reaction the limiting reactant is the reactant that there is the least of in the reaction; it determines the amount of product formed. In a chemical reaction it is the reactant that gets completely "used up"


What is a true of a catalyst?

The catalyst is not a reactant in a chemical reaction but contribute to the success of this reaction.


What is a reactant in science?

A chemical that undergoes a chemical reaction is called a reactant. The chemicals that are produced by a chemical reaction are called the products. So in a chemical reaction, reactants turn into products.


What is a reactant?

A reactant is a substance that participates in and changes during a reaction.


What is the substance that undergoes a chemical reaction?

A reactant.


One of the starting materials in a chemical reaction is called a?

"Reactant" or "reagent".