+91-8076753736 support@wiredfaculty.com

Sponsor Area

Control And Coordination

Question

Wired Faculty App

The pH of a hydrochloric acid solution is 3. Does it mean that it has only hydronium ions. If not, how are OH^– ions generated?

Solution

If the pH is less than 7, i.e., 3 here, it does not mean the solution has only H⁺ ions. It only means that the concentration of H⁺ ions is greater than those of OH^– ions and the solution is acidic. In aqueous solutions, water generates both H⁺ and OH^- ions in equal amounts, but very small concentrations. When acid is added to water, concentration of H⁺ions far exceeds those of OH^– ions. (Similarly concentration of OH^– far exceeds H⁺ions when a base is added to water.)

Some More Questions From Control and Coordination Chapter

What do you understand by concentrated and dilute acids?

How do metals react with bases?

What is a neutralization reaction? Give some examples.

What are non-metallic oxides? Substantiate your answer.

Take 5 ml hydrochloric acid in a boiling tube or a conical flask. Add a few pieces of zinc granules to it.

(a) What do you observe on the surface of zinc granules?
(b) Name the gas evolved.
(c) What happens when the above gas is passed through soap solution?
(d) What happens when a burning candle is brought near the gas filled tube?

Name four acids and bases. Write their formulae.

Name the various kind of oxides and mention their properties.

What are acids? How are they produced?

Mention important characteristics of acids.

Why the vessels of copper and brass need ‘Kalai’?

Mock Test Series

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation