precipitation reactions Flashcards
1
Q
What is the reaction of Cu2+ with NaOH or NH3?
A
Cu2+ +2OH- –> Cu(OH2) (s)
pale blue solution –> light blue ppt
2
Q
what is the reaction of Fe2+ with NaOH or NH3?
A
Fe2+ + 2OH- –> Fe(OH)2
pale green solution –> green ppt turning rusty brown in air
3
Q
what is the reaction of Fe3+ with NaOH or NH3?
A
Fe3+ + 2OH- –> Fe(OH)3
pale yellow solution –> rusty brown ppt
4
Q
what is the reaction of Mn2+ with NaOH or NH3?
A
MN2+ + 2OH- –> MN(OH)2
pale pink solution –> light brown ppt
5
Q
what is the reaction of Cr3+ with NaOH or NH3?
A
Cr3+ + OH- –> Cr(OH)3
pale purple solution –> grey-green ppt
6
Q
what is the reaction of Co2+ with NaOH or NH3?
A
Co2+ + 2OH- –> Co(OH)2
pink solution –> dark blue turning beige in air
