Acids and bases

What is an acid?

• a chemical substance that neutralizes alkalis, dissolves some metals, and turns litmus paper red
• Has a pH of 11
• Has a pH of 7

What is a base?

• Has a pH of 3
• Has a pH of 7
• substances that are slippery to the touch; turns red litmus paper blue

Which of the following statements about acids is true?

• They taste sweet.
• They taste sour.
• They have a pH between 8-14.

Which item is an acid?

• Drain cleaner
• Ammonia
• An orange.

What does a pH scale do?

• Tells if a substance is an acid or base
• Measures the strength and weakness of acids and bases
• Both statements are correct

You can eat or drink an acid.

• True 
• False

Rainwater is an acid.

• True 
• False

You can eat or drink a base.

• True
• False

What is another name for a base?

• Acid
• Alkaline
• pH

What is the pH of water?

• 11
• 4
• 7