Molarity & Rate Law: Does It Affect Constants?

[jessica.so]

If you have different molarities of an acid, would it affect the rate law and have different constants for each molarity?

 

[Borek]

Rate constant doesn't depend on the concentration, speed does.

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[quicknote]

I can confirm that molarity can indeed affect the rate law and result in different constants for each molarity. Molarity, or the concentration of a solution, is a key factor in determining the rate of a chemical reaction. The rate law is a mathematical representation of the relationship between the concentration of reactants and the rate of the reaction. Therefore, if the molarity of an acid changes, the rate law will also change to reflect this.

The rate law is determined experimentally by measuring the initial rates of a reaction at different concentrations of the reactants. As the molarity of the acid changes, the concentration of the reactant in the rate law equation will also change, resulting in a different rate constant for each molarity. This is because the concentration of the reactant directly affects the frequency of collisions between reactant particles, which in turn affects the rate of the reaction.

It is important to note that the rate law and rate constant are not constants themselves, but rather they are specific to a particular reaction at a given set of conditions. Therefore, different molarities of an acid will result in different rate laws and rate constants, reflecting the unique relationship between concentration and reaction rate.

In conclusion, molarity does indeed affect the rate law and can result in different constants for each molarity. This highlights the importance of carefully controlling and measuring the concentration of reactants in order to accurately determine the rate law and rate constant for a given reaction.