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Properties of Water

How would you...

Question

How would you distinguish between the following set of compounds?
zinc chloride and calcium chloride

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Solution

Use flame test to identify them

zinc burns with blue-green to pale green color so zinc chloride burns with blue-green color

and calcium gives orange-red flame and calcium chloride will burn with orange-red flame.

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Q. Using sodium hydroxide solution, how would you distinguish:
(a) Ammonium sulphate from sodium sulphate.
(b) Zinc nitrate solution from calcium nitrate solution.
(c) Iron (II) chloride from Iron (III) chloride.

Q. Give one chemical test to distinguish between the following pairs of compounds:
(i) Zinc sulphate solution and zinc chloride solution.
(ii) Iron (II) chloride solution and iron (III) chloride solution.

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(a) zinc nitrate solution from calcium nitrate solution?
(b) iron (II) chloride from iron (III) chloride?
(c) lead hydroxide from magnesium hydroxide?

Q. (a) State the colour of the residue formed when nitrates of
1. Calcium 2. Zinc 3. Lead 4. Copper are strongly heated.

(b) Give one test each to distinguish between the following pairs of chemicals.
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2. Sodium nitrate solution and sodium chloride solution.
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