Practical Chemistry CHEMISTRY - Practical Chemistry

Write balanced equations when the substances are heated strongly:
Iodine I2(s)

Write balanced equations when the substances are heated strongly:
Ammonium chloride

Write balanced equations when the substances are heated strongly:
Ammonium dichromate

Write balanced equations when the substances are heated strongly:
Zinc nitrate hexahydrate

Write balanced equations when the substances are heated strongly:
Lead nitrate

A mixture consists of sand and common salt. Briefly describe the experimental procedure for calculating the percentage of sand.

Identify the gases from the observations:
A colourless gas, which changes to steamy vapours on cooling. It forms colourless, tiny droplets of liquid which turn anhydrous copper sulphate blue and anhydrous cobalt chloride pink.

Identify the gases from the observations:
A colourless gas having a rotten eggs like smell. It turns limewater milky and moist lead acetate paper silvery black.

Identify the gases from the observations:
A reddish brown gas having a pungent smell. It tums moist potassium iodide paper brown.

Identify the gases from the observations:
A greenish yellow gas having a pungent and suffocating smell. It turns moist blue litmus paper red and then bleaches it.

How will you distinguish between the following by flame test?
(a) Sodium sulphate and zinc sulphate.
(b) Potassium carbonate and calcium carbonate.

How will you distinguish between copper carbonate and copper nitrate by heating alone?

Using dilute sulphuric acid only how will you distinguish between the following: State clearly the chemical reactions taking place and the tests for the gase2ous products.