Acids, Bases, and pH

Mr. Andersen explains the concept of pH, its importance in biology, and how it is determined. He discusses the molecular structure of water, the formation of hydronium and hydroxide ions, and the calculation of pH values. The video covers the characteristics of acids and bases, providing examples like hydrochloric acid and sodium hydroxide. It concludes with the environmental impact of pH changes, such as acid rain and ocean acidification.

Why is maintaining a constant pH level important for proteins like myoglobin?

• It prevents the protein from becoming too active.

• It ensures the protein remains in its active form.

• It allows the protein to change its structure frequently.

• It helps the protein to dissolve in water.

What type of bond is formed between the hydrogen of one water molecule and the oxygen of another?

• Ionic bond

• Covalent bond

• Hydrogen bond

• Metallic bond

What does the pH scale measure?

• The amount of oxygen in a solution

• The concentration of hydrogen ions

• The temperature of a solution

• The density of a solution

What happens to the pH when the concentration of hydrogen ions increases?

• The pH remains the same

• The pH decreases

• The pH increases

• The pH becomes neutral

Which of the following is a common acid found in the stomach?

• Acetic acid

• Sulfuric acid

• Hydrochloric acid

• Nitric acid

How does the addition of sodium hydroxide to water affect the pH?

• It decreases the pH

• It increases the pH

• It has no effect on the pH

• It neutralizes the pH

What environmental issue is caused by the combination of carbon dioxide and water in the oceans?

• Deforestation

• Ocean acidification

• Ozone depletion

• Global warming