Question
How will you demonstrate the solubility of ammonia in water? Explain.
✓
Answer
Ammonia is highly soluble in water. This can be demonstrated by Fountain
experiment.
• We take a round bottom flask filled with ammonia gas.
• The flask is closed with a two holed rubber stopper, one for the jet tube and the other for a dropper filled with water.
• The flask is fixed to the stand in an inverted position .
• The free end of the jet tube is dipped into a beaker containing red litmus
solution .
• When the bulb of dropper is pressed, it is observed that red litmus solution rises up and strikes the wall of the flask and spreads in form of fountain, which is blue in colour.
experiment.
• We take a round bottom flask filled with ammonia gas.
• The flask is closed with a two holed rubber stopper, one for the jet tube and the other for a dropper filled with water.
• The flask is fixed to the stand in an inverted position .
• The free end of the jet tube is dipped into a beaker containing red litmus
solution .
• When the bulb of dropper is pressed, it is observed that red litmus solution rises up and strikes the wall of the flask and spreads in form of fountain, which is blue in colour.
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(iii) Which element is not able to form any type of bond?
(iv) Draw electron dot structure of bond formation of 'A' molecule.
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| A | 2, 8, 6 |
| B | 2, 8, 8 |
| C | 2, 8, 8, 1 |
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| E | 2, 8, 2 |
(ii) Which two elements will combine to form a covalent bond?
(iii) Which element is not able to form any type of bond?
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$(a)$ Ammonium nitrate $[NH_4NO_3]$
$(b)$ Ammonium phosphate $[(NH_4)_3PO_4(N=14,H=1,O=16,P=31)]$
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$(b)$ Ammonium phosphate $[(NH_4)_3PO_4(N=14,H=1,O=16,P=31)]$
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If $15.8g$ of potassium permanganate $(VII)$ was used in the reaction, calculate the mass of iron $(II)$ sulphate used in the above reaction.
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→$C_3H_{8 }+ 5O_{2 }\rightarrow 3CO_2 + 4H_2O$
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(iii)Hydrogen Chloride
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(v)Carbon Dioxide
(vi)Oxygen
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(c) Mass of oxygen liberated.
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