Industrial Processes, Cracking And Polymerisation

Question 1

What is cracking?

Answer 1

The process of breaking down long chain alkanes into shorter ones

Question 2

How do you do cracking

Answer 2

1. Heat to 700 degrees

2. Add silica or alumina

Question 3

What is an addition polymer?

Answer 3

A long chain molecule that has been formed by the joining of many monomers

Question 4

What must a monomer contain for addition polymerisation?

Answer 4

A c-c double bond

Question 5

How does a monomer change during addition polymerisation?

Answer 5

The double bond breaks

Question 6

What is a liquid that conducts electricity?

Answer 6

An electrolyte

Question 7

What goes to the cathode when h2so4 is electrolysed?

Answer 7

Hydrogen ions

Question 8

What goes to the anode when h2so4 is electrolysed?

Answer 8

Hydroxide ions

Question 9

How do you calculate the a,punt of coulombs?

Answer 9

Current x time

Question 10

What is an electron mole?

Answer 10

1. Think about a half equations

2. The no. of electrons is the no. of electron moles needed to make one mole of atoms

Question 11

How do you calculate masses in electrolysis?

Answer 11

1. Write out he balanced half equations
2. Calculate the no. of carafes
3. Calculate the no. of moles of atoms produced (divide faraday by no. for electrons in the half equation
4. Write out the molar mass to work out the actual mass (mr x moles)