Question

what happens when metals react with water please give your answer in 100 words ​

Answer 1

Answer:

when metal react with water it produces metal oxide and hydrogen gas

when metal react with water it produces metal oxide and hydrogen gasex. Na+h2O-->NaO+H2

Answer 2

Answer:

• Metals react with water and produce a metal oxide and hydrogen gas.
• Metal oxides that are soluble in water dissolve in it to further form metal hydroxide.
• But all metals do not react with water.

Metal + Water → Metal oxide + Hydrogen

• Metals like potassium and sodium react violently with cold water.
• In case of sodium and potassium, the reaction is so violent and exothermic that the evolved hydrogen immediately catches fire.

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

2Na(s) + 2H2O(l) → 2NaOH(aq) + H2 (g) + heat energy

• The reaction of calcium with water is less violent.
• The heat evolved is not sufficient for the hydrogen to catch fire.

Ca(s) + 2H2O(l) → Ca(OH)2 (aq) + H2 (g)

• Calcium starts floating because the bubbles of hydrogen gas formed stick to the surface of the metal.
• Magnesium does not react with cold water. It reacts with hot water to form magnesium hydroxide and hydrogen.
• It also starts floating due to the bubbles of hydrogen gas sticking to its surface.

• Metals like aluminium, iron and zinc do not react either with cold or hot water.
• But they react with steam to form the metal oxide and hydrogen

2Al(s) + 3H2O(g) → Al2O3 (s) + 3H2 (g)

3Fe(s) + 4H2O(g) → Fe3O4 (s) + 4H2 (g)

• Metals such as lead, copper, silver and gold do not react with water at all.

Hope it helps

Good luck