Paper 2 Revision

Question 1

How are copper compounds (or any metal compound) obtained by phytomining?

Answer 1

-Grow plants on land containing copper ores, then burn the plants
-Ash (from burning) contains copper compounds

Question 2

For a curved graph, when it’s asking you to find the rate of reaction (gradient) at a specific point (150s), what do you have to remember to draw to find the gradient?

Answer 2

A tangent from that point and then find the gradient of that line (change in y/change in x)

Question 3

What piece of apparatus is used to measure the volume of gas produced?

Answer 3

-Gas syringe
-Inverse measuring cylinder and a water trough

Question 4

What should you talk about when asked about conclusions from a graph considering rate of reaction (y-axis) and time (x-axis) between two reactants?

Answer 4

-If rate decreases or increases
-If rate decreases/increases more slowly as time increases OR if rate decreases/increases more quickly as time increases (non-linear rate)
-If rate decreases/increases at a linear or non-linear rate
-When the rate becomes zero