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Metals Reaction with Acid

What do you o...

Question

What do you observe when

(a) dilute sulphuric acid is added to granulated zinc ?

(b) a few pieces of iron are dropped in a blute solution of sodium chloride ?

(c) silver nitrate is added to a solution to a of sodium chloride ?

(d) ferrous sulphate solution is added to an aqueous solution of sodium hydroxide.

(e) solid lead nitrate is heated ?

(f) when dilute sulphuric acid is added to barium chloride solution ?

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Solution

(a) When Zinc reacts with dilute sulphuric acid, hydrogen gas is evolved with an effervesence.
$Z n + d i l . H_{2} S O_{4} \to Z n S O_{4} + H_{2}$ .
(b) When a few pieces of iron are dropped into a blue coloured copper sulphate solution, the blue
colour of the solution fades and eventually turns into green.(c) When a solution of silver nitrate is added to a solution of sodium chloride, white insoluble ppt. of
silver chloride is formed.
$A g N O_{3} (a q) + N a C l (a q) \to A g C l (p p t) + N a N O_{3} (a q)$
(d) When ferrous sulphate solution is added to sodium hydroxide solution, a dirty green ppt. of ferrous
hydroxide is formed.
$F e S O_{4} (a q) + 2 N a O H (a q) \to F e (O H)_{2} ↓ + N a_{2} S O_{4} (a q)$
(e) When solid lead nitrate is heated, it decomposes to produce light yellow solid lead monoxide,
reddish brown nitrogen dioxide gas and colourless oxygen gas.

$2 P b (N O_{3})_{2} \to 2 P b O + 4 N O_{2} + O_{2}$
(f) When few drops of dilute sulphuric acid is added to barium chloride solution, a white precipitate of barium sulphate is formed.

$B a C l_{2} + d i l . H_{2} S O_{4} \to B a S O_{4} ↓ + 2 H C l$ .

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Similar questions

Q. State your observations when:
(i) Dilute hydrochloric acid is added to lead nitrate solution and the mixture is heated.
(ii) Barium chloride solution is mixed with sodium sulphate solution.
(iii) Concentrated sulphuric acid is added to sugar crystals.
(iv) Dilute hydrochloric acid is added to copper carbonate.
(v) Dilute hydrochloric acid is added to sodium thiosulphate.

Q. The questions (i) to (v) refer to the following salt solutions listed (a) to (f):
(a) Copper nitrate
(b) Iron (II) sulphate
(c) Iron (III) chloride
(d) Lead nitrate
(e) Magnesium sulphate
(f) Zinc chloride

(i) Which two solutions will give a white precipitate when treated with dilute hydrochloric acid followed by barium chloride solution?
(ii) Which two solution will give a white precipitate when treated with dilute nitric acid followed by silver nitrate solution?
(iii) Which solution will give a white precipitate when either dilute hydrochloric acid or dilute sulphuric acid is added to it?
(iv) Which solution becomes a deep/inky blue colour when excess of ammonium hydroxide is added to it?
(v) Which solution gives a white precipitate with excess ammonium hydroxide solution?

What do you observe when barium chloride solution is added to dilute sulphuric acid?

What do you observe when ammonia hydroxide is added to the aqueous solution of :

(a) $F e S O_{4}$ , (b) Iron (III) chloride,

(c) Lead nitrate, (d) Zinc nitrate ?

What do you observe when

(a) Iron nail is kept in copper sulphate solution for sometime.

(b) Phenolphthalein is added to sodium hydroxidee solution.

(c) Blue litmus paper is dipped in dilute hydrochloric acid.

(d) Lead nitrate is heated.

(e) magnesium ribbon is burnt in oxygen.

(f)ammonia is brought in contact of hydrogen chloride gas.

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Metals Reaction with Acid

Standard VIII Chemistry

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