Acids and bases: Strength and conc, pH scale, types of oxides

Question 1

Strong acids

Answer 1

• completely ionized in aqueous sol e.g. HCl

- fully ionizes regardless of conc

Question 2

Weak acids

Answer 2

-only partially ionized in aqueous sol e.g. CH3COOH `

Question 3

Strength of acid

Answer 3

• don’t confuse it with conc of acid
• “strong” and “weak” refer to extent of ionization of acid
• “concentrated” and “dilute” tell us how much of an acid is dissolved in the sol
• strength not affected by conc

Question 4

Acidic oxide

Answer 4

• mostly non-metals
• dissolve in water to form acids
• don’t react with acids, react with alkalis to form salt and water

Question 5

Basic oxide

Answer 5

• -mostly metals
• insoluble in water (sodium and potassium are soluble and dissolve readily in water to from alkali)
• solids at room temp
• react with acids to form salt and water

Question 6

Amphoteric oxide

Answer 6

• metallic oxides

- react with both bases and acids, form salt and water