Question

Explain the reaction of metals and nonmetals with water

Answer 1

Answer:

Metal react with water and produce a metal oxide and hydrogen gas.metal oxide that are soluble in water dissolve in it to further form metal hydroxide.

But all metal do not react with water.

Metal+water---> metal oxide+ hydrogen

Metal oxide + water---> metal hydroxide

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

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

Calcium start floating because the bubbles of hydrogen gas formed stick toh surface of metal.

Magnesium does react with cold water. It react with hot water to form magnesium hydroxide and hydrogen . it also start floating due to the bubbles of hydrogen gas sticking to its surface.

Metal like aluminium, iron and Zink do not react with either cold or hot water.but they react with stream to form the metal oxide and hydrogen.

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

HOPE THIS HELPS!

Answer 2

Reaction of metals with water :-

Sodium and potassium metal react rapidly and vigorously with water and liberates

hydrogen gas.

2Na (s) + 2H2 gives O (l) 2NaOH (aq) + H2 (g)+ heat

2K(s) + 2H2 gives O (l) 2KOH (aq) + H2

(g)+ heat

On the other hand, calcium reacts with water slowly and less vigorously. The hydrogen gas released in this reaction collects on the surface of the metal in the form of bubbles and the metal floats on water.

2Ca(s) + 2H2 gives O (l) 2Ca(OH)2

(aq)+ H2(g)

The metals; aluminium, iron and zinc do not react with cold or hot water, but they react with steam to form their oxides. Hydrogen gas is released in this reaction.

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

3Fe(s) + 42O (g) gives Fe3O4(s) + 4H2(g)

Zn(s) + H2O(g) ZnO(s) + H2 (g)

Reaction of nonmetals with water : Generally, nonmetals do not react with water,except the halogens.

For example, chlorine on dissolving in water gives the following

reaction.

Cl2 (g) + H2O(l) ----> HOCl(aq) + HCl(aq)

Hope this helps! ❤️