Acids, bases and salts

The pH of a neutral solution at 25 degrees C is:

• 1 7
• 2 1
• 3 0
• 4 14

Which of these is a strong acid?

• 1 Hydrochloric acid
• 2 Acetic acid
• 3 Carbonic acid
• 4 Citric acid

Litmus turns red in:

• 1 Neutral solutions
• 2 Bases
• 3 Acids
• 4 Salt solutions of strong bases

Acid + base gives:

• 1 Metal and acid
• 2 Only water
• 3 Salt and water
• 4 Salt and hydrogen

A solution has a pH of 3. It is:

• 1 Acidic
• 2 Basic
• 3 Neutral
• 4 A salt

A solution has [H+] = 1 x 10^-4 mol/dm3. What is its pH?

• 1 10
• 2 1
• 3 4
• 4 -4

Which of these is a base?

• 1 Citric acid
• 2 Sodium hydroxide
• 3 Hydrochloric acid
• 4 Vinegar

Phenolphthalein is pink in:

• 1 Alkalis
• 2 Neutral solutions
• 3 Pure water
• 4 Acids

The pH of a strong base is about:

• 1 7
• 2 1 to 2
• 3 13 to 14
• 4 3 to 4

Common salt, NaCl, is formed from the reaction of:

• 1 H2SO4 and KOH
• 2 HCl and NaOH
• 3 CH3COOH and NaOH
• 4 HNO3 and KOH