Question

(a) Describe the reaction of potassium with water. Write the equation of the reaction involved.
(b) Write an equation of the reaction of iron with steam. Indicate the physical states of all the reactants and products.
(c) Which gas is produced when dilute hydrochloric acid is added to a reactive metal?

Answer 1

Answer:

The Reactions are given below:

(a) Pottasium reacts violently with cold water to form potassium hydroxide and hydrogen gas.In this reaction so much heat is produced that results to the hydrogen gas formed catches fire and burns explosively.

$2K(s)+2H_{2}O(l)$→$2KOH(aq)+H_{2} (g)+heat$

(b)  The reaction of Iron with steam is as follows

$3Fe(s)+4H_{2}O(g) Steam$→$Fe_{3}O_{4} (s)+4H_{2}(g)$

(c) Hydrogen gas is evolved when dilute hydrochloric acid is added to a reactive metal.

Answer 2

Hydrogen gas is Evolved

Explanation:

• (a) Potassium reacts violently with cold water to form potassium hydroxide and hydrogen gas.

$2K + 2H_2O (l)$ ----> $2KOH + H_2 (g) + Heat$

• b.) Reaction of iron with steam -

$3Fe (s) + 4H_2O (g)$ -----> $Fe_3O_4 (s) + 4H_2 (g)$

• c.) Hydrogen - gas is produced when dilute hydrochloric acid (HCl) is added to a reactive metal.