Understanding pH Levels and Testing

What is considered a neutral pH value?

• 11

• 7

• 5

• 9

Which pH value range is classified as acidic?

• 0 to 6.9

• 7 to 7.9

• 8 to 14

• None of the above

What is the purpose of pH paper in the experiment?

• To measure temperature

• To change the color of liquids

• To determine pH by color change

• To clean the substances

What color did the pH paper turn when testing with water?

• Blue

• Red

• Green

• Yellow

Which substance tested as a strong acid?

• Water

• Soap

• Vinegar

• Bleach

What pH range did bleach fall into during the experiment?

• 12-13

• 3-4

• 5-6

• 7-8

How did the pH paper react to the soap?

• Turned black

• Turned red

• Did not change color immediately

• Turned instantly

What was the pH level of Sprite after allowing the color to develop?

• Around 10-11

• Around 4-5

• Around 6-7

• Around 8-9

Which cleaner showed a pH close to 10?

• None of the above

• Hand soap

• Glass cleaner

• Floor cleaner

What alternative method can be used to determine the pH of substances?

• Litmus paper

• Thermometer

• Barometer

• Hygrometer