Acids, Bases and indicators

Which has a pH below 7?

• Acid
• Base

Which has a bitter taste?

• Base
• Acid
• flagella
• cila

Which has a slippery texture?

• Acid
• Base

Turns litmus red

• Acids
• Bases
• All

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

Tags

NGSS.HS-PS1-1

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

Tags

NGSS.MS-PS1-2

Examine the results (color change) of the pH paper shown in the picture. What type of substance was tested?

• an acid

• a base

• a neutral substance

• none of the above