what is zero order reaction?give two examples. in a first order reaction the concentration reactant is reduced it one fourth of it's initial value is 50second.calculate the rate constant of the reaction.
Answers
Answer:
The half-life of a substance is the time it takes for it to decrease to half its original concentration. For first-order reactions, it is related to the rate constant k through the expression: k=0.693t1/2 k = 0.693 t 1 / 2
Explanation:
Answer:
Use graphs of zero-order rate equations to obtain the rate constant and the initial concentration data
Key Points
For a zero-order reaction, increasing the concentration of the reacting species will not speed up the rate of the reaction.
Zero-order reactions are typically found when a material that is required for the reaction to proceed, such as a surface or a catalyst, is saturated by the reactants.
A reaction is zero-order if concentration data is plotted versus time and the result is a straight line.
Term
zero-order reactionA reaction that has a rate that is independent of the concentration of the reactant(s).
Unlike the other orders of reaction, a zero-order reaction has a rate that is independent of the concentration of the reactant(s). As such, increasing or decreasing the concentration of the reacting species will not speed up or slow down the reaction rate. Zero-order reactions are typically found when a material that is required for the reaction to proceed, such as a surface or a catalyst, is saturated by the reactants.
The rate law for a zero-order reaction is rate = k, where k is the rate constant. In the case of a zero-order reaction, the rate constant k will have units of concentration/time, such as M/s.