Question

Write the chemical equations for the reaction of the following (3 Marks)

metals.

A) Sodium with water

B) Magnesium with hydrochloric acid

C) Aluminium with stea​

Answer 1

Answer:

Sodium metal reacts rapidly with water to form a colourless basic solution of sodium hydroxide (NaOH) and hydrogen gas (H2). The reaction continues even when the solution becomes basic. The resulting solution is basic because of the dissolved hydroxide. The reaction is exothermic.Magnesium reacts with hydrochloric acid according to the equation: Mg(s) + 2 HCl(aq) --> MgCl 2(aq) + H 2(g) This demonstration can be used to illustrate the characteristic reaction of metals with acid, a single replacement reaction, or to demonstrate the generation of hydrogen gas.Magnesium burns in steam to produce white magnesium oxide and hydrogen gas. Very clean magnesium ribbon has a very slight reaction with cold water. After several minutes, some bubbles of hydrogen form on its surface, and the coil of magnesium ribbon usually floats to the surface.Like the reaction between magnesium and water, it is possible to react aluminium with steam. However, the aluminium oxide produced forms a barrier on the surface of the aluminium which prevents further reaction. When aluminium reacts with steam, the products are aluminium oxide and hydrogen gas.

Explanation: