Testing for Cations - Cation Precipitation Test

Question 1

Method

Answer 1

1. Place approximately 1 dropping-pipette full of a metal cation solution into a test tube
2. Add sodium hydroxide solution drop by drop to it until a precipitate (ppt/ppte) forms

Question 2

Iron(II) Fe2+

Answer 2

Green precipitate forms

Question 3

Iron (III) Fe3+

Answer 3

Brown precipitate forms

Question 4

Copper (II) Cu2+

Answer 4

Blue precipitate forms