Question

Place an X next to each action that would most likely increase the reaction rate.

1.__ Lowering the temperature of the reactants.
2.__ Dissolving two solids in water before mixing them together.
3.__ Diluting an aqueous solution of HCI with water before adding a piece of magnesium.
4.__ Grinding a solid into fine particles.
5.__ Adding an enzyme catalyst.

Answer 1

2.__ Dissolving two solids in water before mixing them together.

4.__ Grinding a solid into fine particles.

5.__ Adding an enzyme catalyst.

Step-by-step explanation:

The rate of reaction is the measure of the speed of a chemical reaction.

Some factors affects the rate of reactions such as pressure, temperature, concentration, surface area, presence of catalyst.

• Reactions in liquid medium are much faster than those between solids because there is a flow of substances. As they come in contact with one another, collision begins to take place.
• Grinding a solid into fine particles increases the surface area. An increase in surface area increases the rate of reaction.
• Adding an enzyme catalyst lowers the activation energy and reduces the energy barrier that must be overcome before a reaction takes place.