C6 - Rates

Question 1

What is rate of reaction?

Answer 1

The speed at which a chemical reaction takes place

Question 2

How to do thenMeasuring gas produced RPA

Answer 2

-React calcium carbonate and hydrochloric acid in a conical flask with a bung and tube to a gas syringe
-Record volume of gas made every ten seconds
-Repeat for different concentrations of acid

Question 3

How to do measuring turbidity change RPA

Answer 3

-Mix reactants in comical flask over a piece of paper with a cross drawn on it
-While looking from above time how long it takes for the mixture to disappear due to to the mixture going cloudy
-Repeat for different concentrations of acid

Question 4

Control variables for rates of reaction RPAS

Answer 4

Volume of reactants
Mass of reactants
Temperature

Question 5

What does the gradient represent on a quantity -time graph for a reaction represent

Answer 5

Rate of reaction (g/s or cm3/s)

Question 6

During a reversible reaction, both the forward and reverse reaction will

Answer 6

Continuously take place

Question 7

What does equilibrium mean?

Answer 7

The forwards rate of the reaction is equal to the backwards rate of the reaction

Question 8

What is La Chatelier’s principle?

Answer 8

If a system at equilibrium is subjected to a change, the system will adjust to counteract the change (do the opposite)

Question 9

Increasing the pressure of a reaction favours the side that produces the

Answer 9

Fewest moles

Question 10

Increasing concentration of a reaction favours the side that produces the

Answer 10

Fewer moles

Question 11

Removing a product from one side shifts the position of equilateral in …. To

Answer 11

That direction, to increase more of it

Question 12

Increasing temperature favours the

Answer 12

Endothermic reaction