Unit 1 Oxidisng And Reducing Agents

Question 1

What does a oxidising agent do?

Answer 1

Cause oxidation reactions to take place
They gain electrons from other atoms/ions
Is itself reduced whilst it oxidises another substance

Question 2

What does a reducing agent do?

Answer 2

Loses electrons to another element/ion
Is itself oxidised while it reduces another substance

Question 3

Where are the best reducing/oxidising agents in electrochemical series

Answer 3

Top right-best reducing
Bottom left-best oxidising

Question 4

Why are the strongest reducing agents alkali metals?

Answer 4

Have low electronegativity and lose electrons very easily

Question 5

Why are the strongest oxidising agents halogens?

Answer 5

Have high electronegatives and gain electrons very easily

Question 6

Name a example of an oxidising agent which is not a element

Answer 6

Group ions such as dichromate(Cr2O4-) is a strong oxidising agent in acidic solutions

Hydrogen peroxide(H2O2)

Question 7

Name a example of a reducing agent which is not a element?

Answer 7

Carbon monoxide(CO)

Question 8

What turns into a ion and atom?

Answer 8

Ions gains electrons to become atoms
Atoms lose electrons to become ions

Question 9

How do u complex ion electron equation?

Answer 9

Balance atoms that are already present
If num of O2 needs balanced add same number of H2O to opposite side
Add twice num of H ions as H2O to other side
Complete equation by adding total number of electrons needed to balance overall electrical charge