Chemistry-27 Rates of reaction

Front

What is the effect of increasing temperature on the rate of reaction?

Back

Increasing temperature generally increases the rate of reaction because it provides more energy to the reactant molecules, leading to more frequent and effective collisions.

Tags

NGSS.HS-PS1-5

Front

Define a catalyst in the context of chemical reactions.

Back

A catalyst is a substance that increases the rate of a reaction without being consumed in the process.

Tags

NGSS.HS-PS1-5

Front

What is one factor that would not speed up a chemical reaction?

Back

Using a large beaker would not speed up a chemical reaction.

Front

Explain how surface area affects the rate of reaction.

Back

Greater surface area allows more collisions between reactant particles, which increases the reaction rate.

Front

Which reaction condition would likely result in the slowest rate of reaction?

Back

Magnesium ribbon in 0.5M HCl at 10 degrees Celsius would have the slowest rate of reaction.

Tags

NGSS.HS-PS1-5

Front

What is the relationship between reaction rate and concentration of reactants?

Back

Generally, increasing the concentration of reactants increases the rate of reaction due to a higher frequency of collisions.

Tags

NGSS.HS-PS1-5

Front

How does the presence of a catalyst affect the activation energy of a reaction?

Back

A catalyst lowers the activation energy required for a reaction to occur, making it easier for the reaction to proceed.

Front

What role does collision theory play in understanding reaction rates?

Back

Collision theory states that for a reaction to occur, reactant particles must collide with sufficient energy and proper orientation.

Tags

NGSS.HS-PS1-5

Front

What is the effect of pressure on the rate of reaction for gases?

Back

Increasing pressure on gaseous reactants increases their concentration, which can lead to an increased rate of reaction.

Tags

NGSS.HS-PS1-5

Front

How does temperature influence the kinetic energy of molecules?

Back

Higher temperatures increase the kinetic energy of molecules, leading to more frequent and energetic collisions.

Tags

NGSS.HS-PS3-2