Acid,bases and salts

Question 1

Identify carbonate anion

Answer 1

• Few drops of HCL (dilute)

- Co2 is given off. Bubble reproduced.

Question 2

Identify chloride ion

Answer 2

2-3 drops of diluted nitric acid- 0.5 cm3 silver nitrate solution

• Turn cloudy-white precipitate
• Cream precipitate if it is bromides
• Pale yellow precipitate if it is iodides.

Question 3

Identify nitrate ion

Answer 3

1cm3 of aqueous sodium hydroxide-spatula of powdered Al-warm gently.

• Red litmus-blue ammonia
• Turns grey/bubbles fizzing

Question 4

Identify sulfate ion

Answer 4

2-3 drops of dilute HCL- 0.5 cm3 of barium chloride solution

White precipitate