How do you find a reaction order?
Would it be like only from experiment and using raw law and specific rate constant??
Why don't you Google "reaction order" without the quotation marks. You will find many sites to read.
To find the reaction order of a given chemical reaction, you typically need experimental data. The reaction order indicates how the rate of reaction changes with respect to the concentration of each reactant. There are a few common methods to determine the reaction order:
1. Method of Initial Rates: In this method, you conduct a series of experiments by varying the initial concentrations of one reactant while keeping others constant. By measuring the initial rates of the reaction, you can determine the relationship between the concentrations and the rate. For example, if doubling the concentration of a reactant doubles the rate, it implies a first-order reaction with respect to that reactant.
2. Integrated Rate Laws: Integrated rate laws describe the relationship between the concentration of a reactant (or reactants) and time. By plotting experimental data and applying integrated rate laws, you can deduce the reaction order. For example, a first-order reaction will result in a straight-line graph of ln(concentration) vs. time, while a second-order reaction will produce a straight-line graph of 1/concentration vs. time.
3. Half-Life Method: For a first-order reaction, the half-life is constant regardless of the initial concentration. By measuring the time it takes for the concentration of a reactant to halve, you can determine if the reaction is first-order.
4. Method of Isolation: In some cases, you can isolate and vary the concentrations of individual reactants while keeping all others constant. By observing the effect on the reaction rate, you can determine the reaction order for each reactant.
It is important to note that the reaction order can only be determined experimentally and may differ from the stoichiometric coefficients in the balanced chemical equation. Therefore, conducting careful experiments and analyzing the data using the appropriate methods is crucial to determining the reaction order accurately.