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Question

What is produced when potassium reacts with water? 2K(s)+2H2O(l)?


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Solution

Step 1: Reaction of metal with water

  • The metal reacts with water to form its corresponding metal hydroxide along with hydrogen gas H2.
  • The general chemical reaction is as follows,

Metal+waterMetalhydroxide+H2(g)

  • The gas produced burns with a pop sound, confirming the gas is to be hydrogen gas.

Step 2: Chemical reaction between potassium and water:

  • When potassium K reacts with water H2O, potassium hydroxide KOH and hydrogen gas are formed as the product.
  • The chemical reaction is as follows,

2K(s)+2H2O(l)2KOH(aq)+H2(g)


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