Elements, Acids, Bases

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

If an acid is combined with a base of equal strength, the result will most likely be

• a neutral solution.
• a stronger acid.
• impossible to tell without testing the pH.
• a stronger base

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

Which of the following statements is correct?

• Blue litmus paper turns red when placed in a base.
• Red litmus paper turns blue when placed in a base.
• Blue litmus paper stays blue when placed in an acid.
• Red litmus paper stays red when placed in a base.

What is neutral on the pH scale?

• 7
• 14
• P shape 
• D shape 

Solution with a low pH.  Contains a lot of hydrogen ions.

• Acidic
• Basic 
• Neutral

Values from 0-14 that determine the acidity of a solution

• Molarity
• Electronegativity
• pH scale
• Solubility

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

• 13
• 14
• 1
• 2

If the pH of a solution is 9, it is a....

• acid
• base
• both
• none