Compare in tabular form the reactivities of the following metals with cold and hot water:
(a) Sodium (b) Calcium (c) Magnesium

Open in App

Solution

Sodium Calcium Magnesium
The reaction of Sodium with cold water is very violent. The reaction of calcium with cold water is less violent. Magnesium does not react with cold water.
It is highly exothermic. Calcium starts floating because the bubbles of hydrogen gas formed stick to the surface of the metal. It reacts with hot water to form magnesium hydroxide.
It also reacts with hot water to form sodium hydroxide. It also reacts with hot water and forms calcium hydroxide. It also starts floating as the bubbles of Hydrogen gas stick to its surface.
$2 Na (s) + 2 H_{2} O (l) \to 2 NaOH (aq) + H_{2} (g) + Heat$ $2 Ca (s) + 2 H_{2} O (l) \to 2 Ca {(OH)}_{2} (aq) + H_{2} (g)$ $Mg (s) + 2 H_{2} O (l) \to Mg {(OH)}_{2} (aq) + H_{2} (g)$

Suggest Corrections

Similar questions

Q. Arrange the metals: calcium, iron, magnesium and sodium in order of their activity with water placing the most reactive first.

Fill in the following blanks with suitable words:
(a) Magnesium liberates ........ gas on reacting with hot boiling water.
(b) The white powder formed when magnesium ribbon burns in oxygen is of...
(c) Ordinary aluminium strips are not attacked by water because of the presence of a layer of ....on the surface fo aluminium.
(d) A metal having low melting point is ... but a non-metal having very high melting point is ...
(e) Calcium is .... reactive metal than sodium.

Choose a metal out of the following which reacts with hot water, not with cold water:

Sodium, Magnesium, Iron

From the metals copper, iron, magnesium, sodium, and zinc, select a different metal that does not react with cold water but reacts with steam when heated.

Also, arrange the given metals in decreasing order of reactivity.

Which amongst the metals: Sodium, Aluminum, Magnesium, Calcium reacts with boiling water?

Join BYJU'S Learning Program

Sodium	Calcium	Magnesium
The reaction of Sodium with cold water is very violent.	The reaction of calcium with cold water is less violent.	Magnesium does not react with cold water.
It is highly exothermic.	Calcium starts floating because the bubbles of hydrogen gas formed stick to the surface of the metal.	It reacts with hot water to form magnesium hydroxide.
It also reacts with hot water to form sodium hydroxide.	It also reacts with hot water and forms calcium hydroxide.	It also starts floating as the bubbles of Hydrogen gas stick to its surface.
$2 Na (s) + 2 H_{2} O (l) \to 2 NaOH (aq) + H_{2} (g) + Heat$	$2 Ca (s) + 2 H_{2} O (l) \to 2 Ca {(OH)}_{2} (aq) + H_{2} (g)$	$Mg (s) + 2 H_{2} O (l) \to Mg {(OH)}_{2} (aq) + H_{2} (g)$

Compare in tabular form the reactivities of the following metals with cold and hot water: (a) Sodium (b) Calcium (c) Magnesium

Compare in tabular form the reactivities of the following metals with cold and hot water:
(a) Sodium (b) Calcium (c) Magnesium