Acids and Bases

Which has a pH below 7?

• Acid
• Base

Turns litmus red

• Acids
• Bases
• All

What pH is the strongest base?

• 1

• 7

• 4

• 14

What colour does a base turn red litmus paper?

• Red

• Blue

What methods can you use to measure the pH of a solution?

• Observing color or clarity
• Measuring mass or volume
• Measuring density or electrical conductivity
• Using acid base-indicators or pH meters

Which of the following is most likely to be basic:

• Lemon juice
• Vinegar
• Laundry detergent
• Coke

Which of these pH values would indicate that a solution is a weak base?

• 4
• 5.6
• 8
• 13

When dissolved in water, acids produce:

• bases
• salts
• hydrogen ions
• hydroxide ions

Which type of ion does a base produce when it is dissolved in water?

• oxide
• oxygen
• hydrogen
• hydroxide

What type of reaction produced an insoluble salt?

• Neutralisation reaction

• Precipitation reaction

• Titration reaction

• Insoluble reaction