0
What is the order of reaction if the half life of a reaction is halved as the initial concentration of the reactant is doubled.?
Wiki User
∙ 14y ago
Second order.
If the half life of a reaction is halved as the initial concentration of the reactant is doubled, it means that half life is inversely proportional to initial concentration for this reaction.
The only half life equation that fits this is the one for a second-order reaction. t(1/2) = 1/[Ao]k
As you can see since k remains constant, if you double [Ao], you will cause t(1/2) to be halved.
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
What is initial rate?
The initial rate refers to the rate at which a chemical reaction occurs at the beginning, when the reactants are first mixed together. It is determined by measuring the change in concentration of a reactant or product over a short period of time immediately after the reaction has started.
What equilibrium concentrations are affected by changing the initial concentration?
Yes, the concentrations are constant but not necessarily static. The 'forward' reaction rate matches the 'reverse' reaction rate.
The direction in whick a reversible reaction will proceed can be predicted from the laws of?
it dependes upon the initial ratio of molar concentration of products to reactants higher the ratio reaction will proceed in the reverse direction and vice versa
When substances change into new substances what is it called?
This substance is called "reactant" or "initial product".
What is the limiting reactant reagent and what is excess reagent in recrystallization?
The Limiting Reactant is the smaller number once you compare the two reactants with one product. The product that you are comparing them both with must be the same. The Excess Reactant is the larger number, or the amount left over in the chemical reaction.
When the concentration of a reactant was 0.100 M the rate of the reaction was 8.42 X 106 M s-1 When the concentration of the reactant was doubled to 0.200 M the rate increased to 1.59 X 105 M s1 What?
What indeed. Your "increased" rate has a lower value than your initial rate.
What is the formula for half-life?
In chemistry, the half-life of a reaction is defined as the time needed for the concentration of a reactant to decrease to half of its initial concentration. According to that definition, the half-life of the reaction will be t1/2 = 0,693/k where k is the equilibrium constant for that reaction at a specific temperature.
When can you predict the reactant in a decomposition reaction?
The reactant is chosen by you; also the study of products of the reaction give information about the initial compound.
What is a reactant and product in chemical reaction?
Reactants are the initial compounds, products are the final compounds.
What is initial rate?
The initial rate refers to the rate at which a chemical reaction occurs at the beginning, when the reactants are first mixed together. It is determined by measuring the change in concentration of a reactant or product over a short period of time immediately after the reaction has started.
What is a reactant?
A reactant is a substance that participates in and changes during a reaction.
Describe the relationship between substrate concentration and the initial reaction rate of an enzyme-catalyzed reaction Is this a linear relationship What happens to the initial reaction rate as sub?
As the substrate concentration increases so does the reaction rate because there is more substrate for the enzyme react with.
How does increasing concentration increases the rate of reaction?
increasing the concentration in a rate of reaction makes the reaction take place faster because if there is more initial particles then there is more particles to react
Does increasing concentration increase the rate of reaction?
increasing the concentration in a rate of reaction makes the reaction take place faster because if there is more initial particles then there is more particles to react
The reactant are the new materials produce during a chemical reaction?
No. The reactants are the initial materials that undergo chemical reaction; the new materials produced have the unsurprising name "products".
How are the words reactant product chemical reaction and catalyst related?
Reactants: the initial substances in a chemical reaction Products: the final substances in a chemical reaction Catalyst: a stimulator of a chemical reaction, not directly involved in the reaction, remain unchanged
How is rate of a chemical reaction usually expressed?
Rates of reaction can be expressed depending upon their order.For example say you have a reaction between two chemicals and the initial rate for that reaction is known :-when:-The concentration of one of the reactants is doubled and the other reactants concentration remains the same and the overall rate of reaction does not change - reaction is zero orderwith respect to chemical which was doubled.The concentration of one of the reactants is doubled and other reactants concentration remains the same and the overall rate of reaction doubles - reaction is first order with respect to chemical which was doubled.The concentration of one of the reactants is doubled and other reactants concentration remains the same and the overall rate of reaction quadruples - reaction is second order with respect to chemical which was doubled.Zero Orderrate = kFirst Orderrate = k [A] (reaction is 1st order with respect to [A] and 1st order overall)Second Orderrate = k [A][B] (reaction is first order with respect to [A] and first order with respect to[B], reaction is second order overall)rate = k [A]2 (reaction is second order with respect to [A] and second order overall)Orders are simply added together in order to determine the overall order of reaction :-rate = k [A][B][C] would be third order overall and first order with respect to each of the reactantsThere are other orders of reaction, for example 2 and 3 quarter orders and third order reactions, but these are a little more complex.
