What happens when sulphur is powder added to water
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The sulfur reacts with oxygen in the flask to form sulfur dioxide gas, which then dissolves in the water, forming sulfurous acid. The solution turns to a yellow color, indicating the acid formation. As more gas dissolves in solution, the solution becomes more acidic.
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Sulphur is a yellow powder which floats on water; sulphuric acid is made by the oxidation of sulphur followed by hydration of the product.
Putting a layer of sulphur on water then adding one drop of oil is the classic demonstration of surface tension.
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