CAPP Chemistry Lab Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

The rate of a chemical reaction is influenced by several key factors, and the choice that includes temperature, concentration, surface area, and catalysts encompasses the primary elements that impact reaction rates.

Temperature plays a crucial role as it affects the energy of the reactants. An increase in temperature generally raises the kinetic energy of the molecules, leading to more frequent and forceful collisions, thus speeding up the reaction rate.

Concentration refers to the amount of reactants present in a given volume. Higher concentrations increase the likelihood of collisions between reactant molecules, which can also result in a faster reaction rate.

Surface area is particularly important in reactions involving solids. A greater surface area allows more opportunities for collisions between the reactants. For example, powdered substances have a greater surface area than larger chunks and will typically react more quickly.

Catalysts are substances that increase the rate of a reaction without being consumed in the process. They work by lowering the activation energy required for a reaction to proceed, allowing more reactant particles to participate in the reaction at a given temperature.

The other factors mentioned in the incorrect choices—material state alone, surface area and catalysts only, or unrelated factors like light and sound intensity—do not capture the complete picture of what influences reaction rates. Therefore