3NT Food Chemistry - Acids & Bases

Acid has a ______ taste.

• sour
• bitter
• soapy
• neutral

Name the acid found in vinegar.

• citric acid
• ethanoic acid
• tannic acid
• hydrochloric acid

Acids turn _____ litmus paper ______.

• blue; blue
• red; red
• blue; red
• red; blue

The pH scale ranges from number _____ to _____.

• 0; 6
• 8; 14
• 1; 14
• 0; 14

Neutral solutions have the pH value of ______.

• 8
• 7
• 6
• 14

—In _____ solutions, both the red and blue litmus will not change colour.

• alkaline
• acidic
• neutral
• dissolved

—A _______ is an instrument used to measure the pH of a substance accurately. 

• universal indicator
• litmus paper
• pH meter
• natural indicators

Acids + base ===> salt + ______

• water
• hydrogen gas
• carbon dioxide gas
• helium gas

To test for hydrogen gas, a _____ sound must be heard.

• kebaboom
• zoom
• pom
• pop

Acids + metal ===> salt + ________

• carbon dioxide gas
• hydrogen gas
• helium gas
• water