Now this KF, our rate constant depends strictly on temperature and types of reactants. It does not depend on the concentrations of reactants nor products. Now, we saw from another video that KF is known as the Iranians equation and it depends strictly on temperature. So at the same temperature we're going to use the same reactant for some given reaction. Now, if we change our reactants, we're also going to have to change our KF because our rate constant also depends on the types of reactants used. Now, one last thing I want to mention is that this rate law, this equation is determined strictly using experimental results.