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State Your Observations When Dilute Hydrochloric Acid is Added to Sodium Thiosulphate - Chemistry

State your observations when Dilute Hydrochloric acid is added to Sodium thiosulphate.

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Solution

Dil. HCl reacts with thiosulphates to produce sulphur dioxide and yellow sulphur is precipitated.

Na2S2O3 + 2HCl → 2NaCl + H2O + SO2 + S ↓

Concept: Hydrogen Chloride - Acidic Properties of Its Solution
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2015-2016 (March) Science Paper 2
Q 1.4
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2015-2016 (March) Science Paper 2 (with solutions)
Q 1.4 | 5 marks
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