RATE OF REACTION (2)

The rate of a chemical reaction is NOT affected by which of the following:

• temperature
• concentration
• particle size (surface area)
• All of these affect reaction rates

Tags

NGSS.HS-PS1-5

Products will form faster if____________

• the particle size of the reactants are larger.
• temperature is decreased.
• concentration of the reactants are increased.
• the reaction is not stirred.

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NGSS.HS-PS1-5

Smaller particle size allows for a _________ surface area to be exposed for the reaction.

• larger

• smaller

• rectangular

• spherical

________ is the measure of how much area of an

object is exposed.

• Surface Area

• Catalyst

• Temperature

• Concentration

Which of the following will lower the rate

of reaction?

• adding an enzyme to the reaction

• decreasing the temperature from 40°C to

  10°C

• breaking a chunk of calcium up into

  smaller pieces

• increasing the amount of solute

  dissolved in a solution

Tags

NGSS.HS-PS1-5

What is the meaning of the rate of reaction?

• Decrease in amount of product

• Decrease in amount of product against time

• Increase in amount of products against time

• Increase in amount of reactants against time

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NGSS.HS-PS1-5

Which reactions has the highest rate of reaction?

• Rusting of water pipe

• Photosynthesis in green plant

• Burning of a small piece of charcoal in the air

• Formation of stalactites and stalagmites

Tags

NGSS.HS-PS1-5

Diagram shows a graph of volume of oxygen gas collected against time in the decomposition reaction of hydrogen peroxide when using manganese dioxide as catalyst.

Which point shows the highest rate of reaction?

• P

• Q

• R

• S

Tags

NGSS.HS-PS1-5

The graph shows how the total volume of a gas given off from a reaction changes with time. In which time interval is least gas given off? 

• A
• B
• C
• D

Order the letters from highest to lowest rate of reaction.

• A > B > C > D
• A > BC > D (B and C have the same rate)
• A > B > CD (C and D have the same rate)
• D > C > B > A

Tags

NGSS.HS-PS1-5