Acids and Bases

Acids have a ______(high / low) pH.

When dissolved in water, acids produce...

• Hydroxide ions (OH-)

• Hydrogen ions (H+)

• Sodium (Na+)

• Heat

When dissolved in water, bases produce:

• acids

• salts
• hydrogen ions (H+)

• hydroxide ions (OH-)

Which of the following is true about acids and bases?

• The lower the pH, the stronger the acid
• the higher the pH, the stronger the acid
• The lower the pH, the more neutral the acid
• The higher the pH, the weaker the base

Which of these solutions is an acid?

• Dish Soap: pH of 12
• Tomato Soup: pH of 4
• Baking Soda: pH of 9
• Drain Cleaner: pH of 14

Ammonia has a pH of 12.  Ammonia is __________.

• an acid
• a base
• an element
• a metal

Soap is a weak base.  What is true about the taste of bases?

• they taste sour
• they taste sweet
• they taste bitter
• they taste salty

What does the pH scale measure?

• the acidity or alkalinity of a substance

• the malleability of a metal
• the temperature of the water in a swimming pool
• the amount of phosphorus in a compound

Williams collected a rain sample and measured its pH to be 5.6.  What does this mean?

• the rain water is a weak base
• the rain water is neutral
• the rain water is a strong acid
• the rain water is a weak acid

Ranging from 0 to 14, a pH value indicates how acidic or basic a solution is.  Which of these pH values would be a strong acid?

• 2
• 6
• 9
• 13