Redox and Chemical Analysis

Question 1

Where to find reducing agents?

Answer 1

The top right hand side of the electrochemical table

Question 2

Where to find oxidising agents?

Answer 2

The bottom left hand side of the electrochemical table

Question 3

What is an oxidising agent?

Answer 3

Gains electrons from other atoms or ions

Question 4

What is a reducing agent?

Answer 4

Loses electrons and donates to another element or ion

Question 5

Steps to balancing ion electron equations

Answer 5

Check the main element is balanced (not O2)
Add water to balance O2
Add H+ to balance hydrogens
Add electrons to ensure charge is the same on both sides

Question 6

What is a Standard Solution?

Answer 6

It is a solution of accurately known concentration.

Question 7

How is a Standard Solution made?

Answer 7

” The weight sample is dissolved in a small volume of deionised water
in a beaker and the solution transferred to a standard flask. The beaker
is rinsed and the rinsings also poured into the standard flash.
The flask is made up to the mark adding the last few drops of water using
a dropping pipette. The flask is stoppered and inverted several times to
ensure thorough mixing of the solution