Cation/Anion tests Flashcards
1
Q
Flame test for Li+
A
Crimson-red
2
Q
Flame test for Na+
A
Yellow-orange
3
Q
Flame test for K+
A
Lilac
4
Q
Flame test for Ca2+
A
Brick-red
5
Q
Sodium hydroxide + Cu2+
A
Blue
6
Q
Sodium hydroxide + Fe2+
A
Green
7
Q
Sodium hydroxide + Fe3+
A
Red-Brown
8
Q
How to detect carbonates?
A
CO2 is given of with HCl
9
Q
(Dilute) nitric acid then silver nitrate sol. + Cl-
A
White precipitate (Silver chloride)
10
Q
(Dilute) nitric acid then silver nitrate sol. +Br-
A
Cream precipitate (Silver bromide)
11
Q
(Dilute) nitric acid then silver nitrate sol. +I-
A
Yellow precipitate (Silver iodide)
12
Q
Test for chlorine gas.
A
Turns damp blue litmus red then bleaches.
13
Q
Why is the wire put in acid?
A
To clean it
To make the substance stick.
14
Q
Test for ammonium ions?
A
Sodium hydroxide solution added
Gently heated.
Ammonia gas given off.
