Introduction to Acids and Bases

Which of the following substances is a base?

• 
• 
• 
• 

Which of these properties describes bases?

• feels slippery

• tastes sour

• reacts with metals to produce hydrogen gas

Which substance reacts with metals to produce hydrogen gas?

• acids

• bases

Tags

NGSS.MS-PS1-2

A pH less than 7 means the solution is a(n)...

• Acid

• Bases

• All

If your slip of paper turns blue, this means your solution is a(n)...

• Acid

• Base

• Neutral

If your slip of paper turns green, this means your solution could be (a) ____ or (a) ____

• Acid

• Base

• Neutral

If your slip of paper turns orange, this means your solution is a(n)...

• Acid

• Base

• Neutral

Tags

NGSS.MS-PS1-2

Which range of numbers represents a basic solution?

• 0-6

• 7

• 8-14

• 3-9

If the pH strip turns orange, which is the correct observation?

• The pH strip turned orange, indicating a pH level of 2.5. This substance is an acid.

• The pH strip turned orange, indicating a pH level of 4. This substance is an acid.

• The pH strip turned orange, indicating a pH level of 2.5. This substance is a base.

• The pH strip turned orange, indicating a pH level of 3.5. This substance is a base.

Tags

NGSS.MS-PS1-2

This image shows how I'd like you to format your observations.

If the pH strip turns dark green, which is the correct observation?

• The pH strip turned dark green, indicating a pH level of 10. This substance is an ACID.

• The pH strip turned dark green, indicating a pH level of 10. This substance is a BASE.

• The pH strip turned dark green, indicating a pH level of 2. This substance is an ACID.

• The pH strip turned dark green, indicating a pH level of 13. This substance is a BASE.

Tags

NGSS.MS-PS1-2