Grade 12 Semester 1 Super Quiz

Acid or Base?

Ca(OH)_² → Ca²⁺ + OH^-

• Base

• Acid

If the pH of the substance is 7. The solution is _____.

• acid

• base

• neutral

Acid or Base?

HCl → H⁺ + Cl^-

• Acid

• Base

TRUE OR FALSE?

Bronsted-Lowry Base accept the proton (H+)

• TRUE

• FALSE

A solution in which [H⁺] = 10^-8 M has a pH of ___ and is ___.

• 8, acidic

• 6, acidic

• 8, basic

• 6, basic

Choose the correct statement about ethanoic acid with a concentration of 2.0x10^-3 M.

• Its pH is 2.7

• H₃O⁺ concentration is 1.9x10^-4 M

• The acid ionised completely in the aqueous solution

• The K_a value increases with increasing concentration of the acid.

Which of the following values would represent the pH of a strong base?

• 1

• 8

• 7

• 13

Acids which dissociate almost completely in aqueous solutions are known as:

• Dilute acids

• Strong acids

• Weak acids

• Concentrated acids

Acids react with active metals to liberate:

• Oxygen

• Carbon dioxide

• Nitrogen

• Hydrogen

When dissolved in water, bases produce:

• acids
• salts
• hydrogen ions
• hydroxide ions