Chem Reaction Rate Quiz#2

Which of the following CAN affect reaction rates? Check all that apply.

• temperature

• concentration

• surface area

• Adding more water

• Pressure

How will a rate of reaction be altered if temperature is increased?

• reaction rate decreases (goes slower)

• reaction rate increases (goes faster)

• reaction rate is constant (stays the same)

When a sugar cube is crushed up, the particles get smaller. How has the surface area of the particles changed?

• the surface area increases

• the surface area decreases

• the surface area remains constant

If solution A is put into an ice water bath before being combined with solution B, how would the reaction rate be altered?

• it would be faster (rate increases)

• it would be slower (rate decreases)

• it would stay the same

How does increasing the concentration affect a reaction rate?

• makes it go faster (increases rate)

• makes it go slower (decreases rate)

• make it go the same rate

A reaction between which of the following would increase the rate of a reaction and make it occur the fastest? What variable is being manipulated?

10 g of aluminum strip and 0.5 M hydrochloric acid at 20°C

10 g of aluminum strip and 0.5 M hydrochloric acid at 60°C

• 10 g of aluminum strip and 0.5 M hydrochloric acid at 20°C; temperature is being altered

• 10 g of aluminum strip and 0.5 M hydrochloric acid at 60°C; temperature is being altered

A reaction between which of the following would increase the rate of a reaction and make it occur the fastest? What variable is being manipulated?

10 g of aluminum strip and 0.5 M hydrochloric acid at 20°C

10 g of aluminum strip and 1 M hydrochloric acid at 20°C

• 10 g of aluminum strip and 0.5 M hydrochloric acid at 20°C; concentration is being altered

• 10 g of aluminum strip and 1 M hydrochloric acid at 20°C; concentration is being altered

A reaction between which of the following would increase the rate of a reaction and make it occur the fastest? What variable is being manipulated?

10 g of aluminum strip and 0.5 M hydrochloric acid at 20°C

10 g of powder aluminum and 0.5 M hydrochloric acid at 20°C

• 10 g of aluminum strip and 0.5 M hydrochloric acid at 20°C; surface area is being altered

• 10 g of granular aluminum and 0.5 M hydrochloric acid at 20°C; surface area is being altered

You have a solution of 0.1 M silver nitrate reacting with a 5 g chunk of salt at room temperature. If you crush/pulverize the salt chunk, how will this alter the reaction rate?

• it will make the reaction faster because you are increasing the surface area of the salt

• it will make the reaction slower because you are increasing the surface area of the salt

• it will make the reaction faster because you are decreasing the surface area of the salt

• it will make the reaction slower because you are decreasing the surface area of the salt

Which of the following is the correct formula for calculating molarity (M)?

• moles/liters of solution

• moles/kg of solvent

• # particles/Avogadro's #