Investigating the Effect of Surface Area on the Rate of Reaction

The video tutorial explores how surface area affects the rate of chemical reactions, focusing on marble chips reacting with hydrochloric acid. It introduces collision theory and presents two experimental methods: measuring the time for marble chips to disappear and collecting carbon dioxide gas. The tutorial emphasizes that increasing surface area increases reaction rates and provides equations to calculate these rates.

What theory explains how chemical reactions occur when particles collide?

• Collision theory

• Quantum theory

• Relativity theory

• String theory

In Method 1, what is measured to determine the reaction rate?

• The pH level of the solution

• The color change of the solution

• The time taken for marble chips to disappear

• The temperature change

Why is it important to use the same mass of marble chips in Method 1?

• To ensure the reaction is faster

• To keep the experiment fair and consistent

• To increase the amount of carbon dioxide produced

• To change the concentration of hydrochloric acid

What is the purpose of the gas syringe in Method 2?

• To add more hydrochloric acid

• To measure the temperature of the reaction

• To collect and measure the volume of carbon dioxide gas

• To stir the reaction mixture

How is the reaction rate calculated in Method 2?

• By multiplying the volume of gas by the time taken

• By dividing the mass of marble chips by the time taken

• By subtracting the initial mass from the final mass

• By dividing the volume of gas collected by the time taken