Quiz #21 Strong Acids and Weak Acids

Which of the following word pairs correctly completes the sentence below?

_______ are corrosive substances characterized as having a strong smell, a sour taste, and a _______.

• Acids; pH less than 7

• Acids; pH greater than 7

• Bases; pH greater than 7

• Bases; pH less than 7

Which of the following is a base?

• orange juice

• water

• vinegar

• dishwashing detergent

Litmus paper can be used to determine the _______ of a substance.

• relative volume

• temperature

• relative pH

• chemical formula

Carrie's teacher hands out test tubes filled with different chemicals and tells the students to identify their liquid as an acid, base, or neutral chemical. Carrie's test tube contains a clear chemical. She adds RED CABBAGE to her test tube and gently moves the tube from side to side. A few moments later, the chemical in the test tube turns bright pink.

What type of chemical does Carrie have?

• Carrie has a neutral chemical.

• Carrie has an acidic chemical.

• Carrie has a basic chemical.

• The type of chemical Carrie has cannot be determined.

The pH of a solution is tested, and it is found to be a basic solution. Of the following choices, what could the pH have been?

• 3

• 9

• 7

• 5

Bleach is a strong base, what is the pH level of bleach?

• 13
• 14
• 1
• 2

Pollution causes the pH of rain water fall below 6. What is such type of rain called?

• Acid rain
• polluted rain
• low pH rain

Acid + base --> ?

• salt + hydrogen gas + water

• salt + carbon dioxide + water

• salt + water

• salt only

Which food is the most acidic?

• bananas
• lemon juice
• orange juice

Which of the following is the correct equation for PHOTOSYNTHESIS?

• CO₂ + light + H₂O --> O₂ + Sugar

• CO₂ + sugar + H₂O --> O₂ + light

• _O2 + light + H₂O --> CO₂ + Sugar

• CO₂ + O₂ + H₂O --> Light+ Sugar