AQA Chemistry Rates of Reaction | Baamboozle - Baamboozle

English 25 Public

Revision game on Module 6 - The Rate and Extent of Chemical Change

Study Slideshow

What two things must happen for particles to react?

They must collide and with enough energy for the collision to be successful

5

The major theory of reaction rate is called

Collision Theory

5

Which is the highest concentration? 10m 2M 25 mmol 0.5M

2 M

5

To slow down a chemical reaction you will do one of the following: Place the reactants in hot water. Place the products in ice bath. Place the reactants in a ice bath. Keep stirring the reactants with a stirring rod.

Place the reactants in a ice bath

5

What are the two methods for measuring the volume of gas produced in a reaction?

Gas syringe or measuring cylinder filled with water

5

Which of the following increase the reaction rate? less surface area. lower temperature. increased concentration

increased concentration

5

Which line, A or B, shows the fastest reaction? Explain your choice.

A because it has a steeper slope or there is more gas produced in a shorter time

5

What does it show when the line of the graphs has levelled off (gone flat)?

That the reaction has stopped

5

Which reaction, A or B, finishes first? How can you tell?

A because the line levels off in the shortest amount of time

5

For both reactions, A and B, the rate of reaction slows down as time progresses. Why does this happen?

The reactants are being used up in the collisions, so their concentration decreases. This means less frequent collisions until one reactant is used up

5

Mention 3 variables affecting the rate of a reaction.

Concentration, temperature, surface area

5

Which changes decrease the rate of reaction between magnesium and air? 1 heating the magnesium to a higher temperature. 2 using a higher proportion of oxygen in the air. 3 using magnesium ribbon instead of powdered magnesium.

3 using magnesium ribbon instead of powdered magnesium

5

Explain how increasing the concentration of a reactant will change the rate of the reaction

There are more particles per unit volume, so more frequent collisions and a faster rate of reaction

5

Explain how decreasing the temperature of a reaction changes the rate of a reaction

The particles will have less energy, so there are less successful collisions and a slower rate of reaction

5

How can we increase the surface area of a solid?

Grind it up into a powder/cut it into smaller pieces

5

When did the reaction at lower concentration stop?

40 seconds

5