9.03: pH Scale 9.04: Acid Base Reactions 9.05: Buffers

Multiple Choice

Which of the following is an example of an element?

• Water
• Carbon 
• Oil
• Carbon Dioxide 

Multiple Choice

An electron is:

• Neutral 
• Positively Charged 
• Electrostatic 
• Negatively Charged 

Multiple Choice

The state of matter with the highest amount of energy is ______.

• solid

• liquid

• gas

• plasma

Multiple Choice

The pH scale is a range from:

• 1-7
• 0-14
• 1-5
• 1-20

Multiple Choice

According to the pH range which substance is more acidic than lemon juice

• Hydrochloric acid
• cabbage
• milk

Multiple Choice

What range of values on the pH scale represent solutions with a higher ratio of hydroxide (OH^-) ions?

• below 7

• 7

• above 7

• 0-14

Multiple Choice

When you place blue litmus paper into an unknown clear solution, the blue litmus paper turns red.

Which of the following represents the most logical conclusion?

• The substance has a pH value of "2".

• The substance is a base.

• The substance has a pH value of "7".

• The substance is acidic.

Multiple Choice

This piece of pH paper has been dipped into:

• An acid
• A base
• A pH-neutral substance
• A buffer

Multiple Choice

Neutralization reactions

• formed from joining positive and negative ions 
• increases OH ions
• froms a salt and water
• increases H2O ions

Multiple Choice

What might happen if buffers did not exist within the human body?

• Our blood and other bodily fluids might become too acidic or basic.

• Our stomach acid would not be able to break down food.

• We would not be able to process glucose within our cells.

• We would not be able to inhale oxygen into our lungs.

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