Acid Base Salt

When you place blue litmus paper into an unknown clear solution, the blue litmus paper turns red.

Which of the following represents the most logical conclusion?

• The substance has a pH value of "2".

• The substance is a base.

• The substance has a pH value of "7".

• The substance is acidic.

Do acids and bases conduct electricity?

• Only acids conduct electricity

• Only bases conduct electricity

• Bases and acids conduct electricity

• Neither conduct electricity

Which of the following indicators turn red in an acidic solution?

• phenolphthalein

• red litmus

• turmeric

• methyl orange

According to the pH range which substance is more acidic than lemon juice

• Hydrochloric acid

• cabbage

• milk

What is the pH range of an acid?

• 0-14

• less than 7

• exactly 7

• greater than 7

Products of a neutralization reaction are always:

• an acid and a base

• an acid and a salt

• a salt and water

• a salt and a base

What is the pH range of a base?

• 0-14

• less than 7

• exactly 7

• greater than 7

Which of the following is an antacid?

• Mg(OH)2

• NaOH

• H2SO

• H2O

Which among the following is not a base?

• NaOH

• KOH

• HCl

• NH₄OH

Neutralization reactions

• formed from joining positive and negative ions 

• increases OH ions

• froms a salt and water

• increases H2O ions