redox and electrode potentials

Question 1

how do we balance redox reactions for acidic conditions

Answer 1

1) first write half equations making sure they are balanced.
2)add in water to balance the oxygen atoms and hydrogen to balance the hydrogen atoms
3)add in electrons to balance the charges
4) balance the electrons
5) cancel and put equations together

Question 2

how do you balance redox equations for alkaline conditions

Answer 2

1) form half equations , making sure the elements are balanced
2) add in water to balance the oxygen atoms
3) add in hydrogen ions to balance the hydrogen atoms
4) add in OH- ions in replace for H+ ions on both sides of equations
3) form H20 from H+ and OH- ions
4)add electrons to balance the charges
5) balance the eletrons , cancel and combine

Question 3

what is a redox titration

Answer 3

a redox titration involves an oxidising agent being titrated against a reducing agent. electrons are transferred from one species to another
- you dont always need an indicator as redox titrations using titration metal ions naturally change colour when changing oxidation state