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Hydrogen Sulphide

Practise balancing equations:

Direction:

In the following equations you will see a blank box before the symbol of each compound and element. Enter the lowest possible number in each box, or leave the box blank if you think the chemical needn't have a number (i.e. the number is equivalent to '1').
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If you want to know the time taken (minutes:seconds) to balance a chemical equation, you click the "Start" button and after balancing the equation, click the "Stop"button. Once, you have noted the time, click the "Reset Timer" button.

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Preparation of Hydrogen Sulphide:

1. When Iron (II)Sulphide is reacted with dilute Hydrochloric acid, Hydrogen sulphide gas is formed:

FeS + HCl → FeCl₂+ H₂S

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2. When Iron (II)Sulphide is reacted with dilute Sulphuric acid, Hydrogen sulphide gas is formed:

FeS + H₂SO₄→ FeSO₄+ H₂S

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Reactions of Hydrogen Sulphide:

1. Hydrogen sulphide gas burns in limited amount of air to form Sulphur and water:

H₂S + O₂→ S + H₂O

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2. In excess air Hydrogen sulphide gas burns with a blue flame to form Sulphur dioxide and water:

H₂S + O₂→ SO₂ + H₂O

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3. Hydrogen sulphide gas reacts with Chlorine gas to form Sulphur and Hydrogen chloride gas:

H₂S + Cl₂→ S + HCl

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4.Hydrogen sulphide gas reacts with Lead (II) nitrate solution to form black precipitate of Lead (II) sulphide:

H₂S + Pb(NO₃)₂→ PbS + HNO₃

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5.Hydrogen sulphide gas reacts with Copper (II) sulphate solution to form brownish black precipitate of Copper(II) sulphide:

H₂S + CuSO₄→ PbS + H₂SO₄

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6.Hydrogen sulphide gas reacts with Zinc sulphate solution to form white precipitate of Zinc sulphide:

H₂S + ZnSO₄→ ZnS + H₂SO₄

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7.Hydrogen sulphide gas reduces Sulphur dioxide gas into Sulphur:

H₂S + SO₂→ S + H₂O

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8.Hydrogen sulphide gas reduces Iron(III)chloride to Iron(II)chloride:

FeCl₃ + H₂S → FeCl₂ + HCl + S

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9.Hydrogen sulphide gas reduces Nitric acid to reddish brown Nitrogen dioxide gas:

HNO₃ + H₂S → H₂O + NO₂ + S

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