Rates of Reaction

List four factors that affects the rate of a reaction

• temperature

• concentration

• surface area

• volume

• catalysts

Tags

NGSS.HS-PS1-5

A temperature increase causes the particles ......

• to slow down

• move faster

• collide higher

• in the right order

Tags

NGSS.HS-PS1-5

How does a catalyst work in speeding up a reaction?

• By lowering the activation energy or reaction

• by giving them more energy

• by making them more available

Tags

NGSS.HS-PS1-5

The following graph shows two different reaction pathways for the same overall reaction at the same temperature. Which pathway is slower and why?

• Red, because the activation energy is larger
• Blue, because the activation energy is lower
• both reaction progress at the same rate

Tags

NGSS.HS-PS1-4

Why does a higher concentration increase the rate of reaction?

• it increases the amount of reactants

• it lowers the activation energy

• it increases the energy of particle collisions

• it increases the frequency of particle collisions

Tags

NGSS.HS-PS1-5

What makes an effective collision?

• When molecules collide.
• When molecules collide with the proper orientation.
• When molecules collide with proper orientation and enough kinetic energy.
• High Temperature.

Tags

NGSS.HS-PS1-5

How could we make this reaction happen more quickly?

• Decrease the concentration of the acid

• crush the chalk to increase the surface area

• Put the test tube in an ice bath

Tags

NGSS.HS-PS1-5

Why does a catalyst increase the rate of reaction?

• it produces extra energy for the reactants

• it increases the speed of the reactant particles

• it increases the frequency of particle collisions

• it provides a lower energy alternate pathway

Tags

NGSS.HS-PS1-5

You add more bodies into a "mosh pit" to hope for more collisions.  You have increased-

• temperature
• concentration
• pressure
• catalyst

Tags

NGSS.HS-PS1-5

Which size marble chips produced the quickest rate of reaction when added to HCl.

• Small

• Medium

• Large

• I dont know

Tags

NGSS.MS-PS1-2