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Why does the colour of potassium permanganate not disappear when excess is added?
The color of potassium permanganate does not disappear when excess is added because it is a self-indicating compound. When there is excess potassium permanganate present, it remains in its colored form (purple) to signal that the reaction is complete or that there are no reducers left to interact with.
What is the name for excretion of potassium in the urine?
The excretion of potassium in the urine is known as kaliuresis. This process helps regulate potassium levels in the body by removing excess potassium from the bloodstream.
Why potassium iodide is added in excess?
Potassium iodide is added in excess to ensure that all available lead nitrate has reacted to form lead iodide. This helps to maximize the yield of lead iodide and ensures that there is no excess lead nitrate remaining in the solution.
What colour change is seen when excess potassium iodine is reacted with chlorine?
When excess potassium iodide is reacted with chlorine, the solution changes from colorless to dark brown due to the formation of Iodine (I2). Excess potassium iodide reacts with chlorine to form iodine, which imparts the dark brown color to the solution.
One mole of calcium phosphide on reaction with excess of water gives what?
One mole of calcium phosphide on reaction with excess water produces calcium hydroxide and phosphine gas. This reaction can be represented as Ca3P2 + 6H2O → 3Ca(OH)2 + 2PH3.
