Acatalyst increases the reaction rate of a reaction by a. lowering the potential energy of the reactants. b. raising the potential energy of the products. c. providing a lower activation energy for the reaction. d. decreasing the enthalpy change of the reaction

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".