Electrochemistry

Question 1

Fe2+ and NaOH

Answer 1

Pale green solution
Green precipitate
Rusty brown in air

Question 2

Mn2+ with NH3

Answer 2

Pale Pink solution
Light brown precipitate
Darkens in air

Question 3

Cu2+ with NaOH

Answer 3

Pale blue solution

Forms blue precipitate

Question 4

Fe3+ with NaOH

Answer 4

Yellow solution

Rusty brown precicipitate

Question 5

Mn2+ with NaOH

Answer 5

Pale pink solution
Forms light brown precipitate
Darkens in air

Question 6

Cr3+ with NaOH

Answer 6

Violet Solution
Grey Green Precipitate
Soluble in excess NaOH makes dark green solution

Question 7

Fe2+ with NH3

Answer 7

Pale green solution
Green precipitate
Rusty brown in air

Question 8

Fe3+ with NH3

Answer 8

Yellow solution

Rusty brown precipitate

Question 9

Cu2+ with HCl

Answer 9

Pale blue solution forms yellow solution

Question 10

Cu2+ with NH3

Answer 10

Pale blue solution
Blue precipitate
Soluble in excess NH3 forms dark blue solution

Question 11

Cr3+ with NH3

Answer 11

Violet solution forms grey green precipitate

Soluble in NH3 forms purple solution