Write your observation when the following take place:-
i)An aqueous solution of sodium chloride is heated to dryness. Ii) A mixture of iron filings and Sulphur is heated strongly iii) A saturated solution of copper sulphate is allowed to evaporate iv) A beam of light is passed through a colloidal solution. v) A suspension is left undisturbed.
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i)An aqueous solution of sodium chloride is heated to dryness.
Crystals of sodium chloride will form
Ii) A mixture of iron filings and Sulphur is heated strongly
A red glow will spread through the mixture and a grey substance called iron (II) sulphide will form.
iii) A saturated solution of copper sulphate is allowed to evaporate
Blue crystals of hydrated copper (II) sulphate will form
iv) A beam of light is passed through a colloidal solution.
Scattering of light will take place. This is known as the Tyndall effect.
v) A suspension is left undisturbed.
Particles will be seen to settle at the bottom of the container. This is called sedimentation.
Crystals of sodium chloride will form
Ii) A mixture of iron filings and Sulphur is heated strongly
A red glow will spread through the mixture and a grey substance called iron (II) sulphide will form.
iii) A saturated solution of copper sulphate is allowed to evaporate
Blue crystals of hydrated copper (II) sulphate will form
iv) A beam of light is passed through a colloidal solution.
Scattering of light will take place. This is known as the Tyndall effect.
v) A suspension is left undisturbed.
Particles will be seen to settle at the bottom of the container. This is called sedimentation.
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