Redox And Volumetric Calculations

Question 1

What is an oxidation reaction

Answer 1

.oxidation is lods
Electrons on RHS
An increase in the O:H ratio

Question 2

What is a reduction reaction

Answer 2

Is the gain of electrons
Electrons on LHS
Decrease in O:H ratio

Question 3

What is a redox reaction

Answer 3

.a redox reaction is one where oxidation and reduction take place together I.e ion electron equations are combined (electrons must be balanced

Question 4

How is the electrochemical series used to:

A) predict whether a reaction will take place or not

B) determine properties of elements (reactivity and how they form ions)

Answer 4

.a) must be higher up on the right than the left

Question 5

What are oxidising agents

Answer 5

.an oxidising agent is a substance that accepts electrons - it gets reduced

• strongest oxidising agent is in group 7
• hydrogen peroxide is a good oxidising agent
• furthest bottom left is next oxidising

Question 6

What are reducing agents

Answer 6

• A reducing agent is a substance that loses electrons
• the strongest reducing agents on the right hand side.
• group 1 contains strongest reducing agent
• metals with low electronegativity are good reducing agents
  Ch4 is a good reducing agent

Question 7

What are substances that act as bleaches/kill bacteria

Answer 7

Oxidising agents are used as bleaches as they break down coloured substances
- they are also used to kill bacteria