Concept of strong and weak acid, strong and weak alkali

Pick the strong acid

• hydrochloric acid

• carbonic acid

• nitric acid

• sulphuric acid

• ethanoic acid

Pick the weak alkali

• ammonia solution

• calcium hydroxide solution

• potassium hydroxide solution

• barium hydroxide solution

which particles are not present in a solution containing dilute hydrochloric acid and ethanoic acid?

• H⁺ ion

• CH₃COO^- ion

• CH₃COOH molecules

• HCl molecule

Which of the following acid is a strong acid?

• Carbonic acid

• Citric acid

• Ethanoic acid

• Hydrobromic acid

What is the meaning of strong acid?

Which of the following is true about weak acid?

• Acids that react partially with alkalis

• Acids that are monobasic

• Acid that produce low concentration of H⁺ ions

• Acid that dissociates partially in H⁺ ions

Hydrogen chloride dissolves in methylbenzene to form a non-electrical conducting solution. Which of the following statements best explain this observation?

• The solution contains molecules only

• Hydrogen chloride is an ionic compound

• Hydrogen chloride is neutralized by methylbenzene

• The solution has equal amount of positive ions and negative ions and thus is electrically neutral

Which of the following statements about 0.1 Moldm^-3 ammonia solution is incorrect?

• The solution contains ammonia molecules

• The solution conducts electricity

• The solution contains hydroxide ions

• The pH value of the solution is 13

pH values for four solution with the same concentration is shown in the above table.

Which solution has the lowest concentration of hydrogen ions?

• P

• Q

• R

• S

Diagram shows two volumetric flasks containing solutions of sulphuric acid and HX acid.

Why is the concentration of hydrogen ions in sulphuric acid higher than in HX acid?

• Sulphuric acid is a diprotic acid.

• Sulphuric acid is a stronger acid

• Sulphuric acid is a monoprotic acid.

• Sulphuric acid is slightly soluble in water