Exam Corrections

Question 1

What is the state symbol for nitric acid?

Answer 1

Aq

Question 2

What is th colour change when nitric acid is added to a mixture of universal indicator and water?

Answer 2

Green to red

Question 3

What are two observations that would be made when zinc carbonate is added to nitric aid until the zinc carbonate is in excess

Answer 3

• the zinc carbonate soild will start to decrease in size

- stops fizzing

Question 4

Explain how a sample can be tested to show carbon dioxide is not present in the mixture?

Answer 4

Use limewater, does not turn milky couldy

Question 5

How does a catalyst increase the rate of reaction?

Answer 5

By lowering the activation energy needed for it to take place

Question 6

How is equilibrium reached?

Answer 6

The pparatus prevents the escape or reactants and products

Question 7

Explain the effect of increasing the temperature on the yield of ammonia gas produced at equilibrium?

Answer 7

The yeild of Ammonia decreases because the system shifts in an endothermic direction