Question

Rubidium is below potassium, in Group I. Predict how it will react with:

a) Water
b) Chlorine
and describe the products that form.
A. a) Violently, producing rubidium hydroxide and hydrogen gas; b) Forms rubidium chloride
B. a) Slowly, producing rubidium oxide and hydrogen gas; b) Forms rubidium chloride
C. a) Vigorously, producing rubidium hydroxide and hydrogen gas; b) Forms rubidium chloride
D. a) Does not react with water; b) Forms rubidium chloride

Answer 1

Rubidium reacts violently with water, producing rubidium hydroxide and hydrogen gas. It also reacts with chlorine to form rubidium chloride.

Step-by-step explanation:

When rubidium reacts with water, it undergoes a violent reaction, producing rubidium hydroxide and hydrogen gas. The equation for this reaction is:

2 Rb(s) + 2 H₂O(l) → 2 RbOH(aq) + H₂(g)

Rubidium also reacts with chlorine to form rubidium chloride:

2 Rb(s) + Cl₂(g) → 2 RbCl(s)