Question

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What is Sulphate Reaction??
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Answer 1

Explanation:

Sulfate attack is generally attributed to the reaction of sulfate ions with calcium hydroxide and calcium aluminate hydrate to form gypsum and ettringite. The formation of ettringite leads to an increase in solid volume, resulting in expansion, cracking, and mass loss, particularly when restrained.

Answer 2

Manganese sulphates solution: It is prepared by dissolving 480 g of MnSO4. 4H2O in water followed by its dilution to one litre. This solution must not develop colour with starch when added to an acidified solution of KI. Alkali–iodide–azide solution: 500 g of NaOH and 150 g of KI are dissolved in water and diluted.