Observe the change in the colour of the each solution taken sulpheric acid
Answers
Answer:
Phenolphthalein turns colorless if dipped in sulphuric acid.
What happens when Sulphuric acid is added to calcium metal?
Answer:
It reacts to form calcium sulfate, which may or may not be in solution. I honestly think that it will be present as a precipitate because CaSO4 cannot dissolve in hot water very well. Hence the hot water, this reaction is very exothermic and violent.
What reacts with sulfuric acid to form a white precipitate?
Answer:
A white precipitate of barium sulfate forms if sulfate ions are present. The hydrochloric acid is added first to remove any carbonate ions that might be present - they would also produce a white precipitate, giving a false positive result. Barium nitrate solution can be used instead of barium chloride solution.
What metal does not react with sulfuric acid?
Answer:
Elements below hydrogen in the electrochemical series don't react with sulphuric acid. They include Copper, Silver, Gold etc. Elements like Platinum and Gold are called noble metals too as they don't react with most of the compounds or other reactants.
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