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What gas evolved when potassium nitrate crystals are heated with concentrated sulphuric acid?
When potassium nitrate crystals are heated with concentrated sulphuric acid, nitric oxide gas (NO) is evolved. This is a result of the oxidation of nitrate ions in potassium nitrate by the sulphuric acid.
What brown coloured gas evolveed when lead nitrate crystals are heated in adry test tube?
The brown colored gas that evolves when lead nitrate crystals are heated in a dry test tube is nitrogen dioxide.
What is the observation when you heat lead nitrate crystals?
A thermally decomposition of the nitrate; the final products are lead oxide and nitrogen dioxide.
When a saturated solution is heated can it recrystallize more crystals?
Yes, when a saturated solution is heated, more solute can dissolve in the solution due to increased solubility at higher temperatures. However, if the solution is then allowed to cool down, excess solute will come out of solution and recrystallize, leading to the formation of more crystals.
Why does copper sulphate solution not evaporate when heated?
Copper sulfate solution does evaporate when heated. As the solution is heated, the water molecules in the solution gain enough energy to overcome the intermolecular forces holding them in the liquid state, and hence evaporate into the air, leaving behind solid copper sulfate crystals.
What gas evolved when potassium nitrate crystals are heated with concentrated sulphuric acid?
When potassium nitrate crystals are heated with concentrated sulphuric acid, nitric oxide gas (NO) is evolved. This is a result of the oxidation of nitrate ions in potassium nitrate by the sulphuric acid.
What is the gas evolved when ammonium chloride and sodium nitrate is heated together?
The gas evolved when ammonium chloride and sodium nitrate are heated together is nitrogen gas (N2). This reaction results in the decomposition of ammonium chloride and sodium nitrate to form nitrogen gas, water vapor, and sodium chloride.
What brown coloured gas evolveed when lead nitrate crystals are heated in adry test tube?
The brown colored gas that evolves when lead nitrate crystals are heated in a dry test tube is nitrogen dioxide.
What is the observation when you heat lead nitrate crystals?
A thermally decomposition of the nitrate; the final products are lead oxide and nitrogen dioxide.
Why is it essential for magnesium chloride solution in the crucible to be heated slowly?
If the solution is not heated slowly, the solution could boil over resulting in lost mass and calculation errors
What happens when ammonium chloride solution is heated with caustic soda solution?
ammonia should release on heating.
What would happen if an aqueous solution of sugar is heated to dryness?
Crystals of sugar are obtained.
How can we obtain potassium nitrate which is free of soil?
A simple method is to filter the aqueous solution; after this the solution is heated to obtain crystallized KNO3.
What gas is evolved when a few crystals of potassium nitrate are heated in a hard glass test tube?
Nitrogen dioxide and oxygen are released.
Why do concentrated solutions with salt leave deposits after heated?
Because water is evaporated and sodium chloride remain as crystals.
What is the residue when sodium chloride water solution was heated to dryness?
When a mixture of sodium chloride and water is heated to dryness, the residue is sodium chloride, because the boiling point of sodium chloride is much higher than the boiling point of water.
Why is the rock salt water solution heated?
The scope is to obtain crystallized sodium chloride.
