Acids and Bases Grade 6

What are the properties of acids?

• Acids have a pH greater than 7

• Acids donate protons, have a pH less than 7, turn blue litmus paper red, and react with metals to produce hydrogen gas.

• Acids turn red litmus paper blue

• Acids accept protons

What are the properties of bases?

• Bases have a pH less than 7, accept electrons

• Bases feel rough, turn blue litmus paper red

• Bases reject protons, have a sweet taste

• Bases accept protons or donate pairs of electrons, have a bitter taste, feel slippery, turn red litmus paper blue, and have a pH greater than 7.

What is the pH scale used for?

• Measuring the temperature of a solution

• Determining the color of a solution

• Calculating the volume of a solution

• Measuring the acidity or alkalinity of a solution

Name a common indicator used to test for acids and bases.

• Universal indicator

• Bromothymol blue

• Phenolphthalein

• Litmus paper

How do acids taste?

• Sweet

• Bitter

• Salty

• Sour

How do bases feel?

• Slippery or soapy

• Sour

• Sweet

• Rough

What is the pH value of a neutral substance?

• 7

• 10

• 8

• 5

Which pH value indicates a strong acid?

• 2 to 3

• 4 to 5

• 0 to 1

• 6 to 7

Which pH value indicates a strong base?

• pH value between 5 and 6

• pH value equal to 7

• pH value greater than 7

• pH value less than 7

What color does litmus paper turn in an acidic solution?

• yellow

• green

• blue

• red