Buffer Solutions Quiz

What is a buffer solution?

• A solution that always has a high pH

• A solution in which the pH does not change a lot when small amounts of acids or alkalis are added

• A solution with a constantly changing pH

• A solution that cannot resist changes in pH

What is a common buffer solution made of?

• Nitric acid and sodium nitrate

• Ethanoic acid and sodium ethanoate

• Hydrochloric acid and sodium chloride

• Sulfuric acid and sodium sulfate

What happens when H+ ions are added to a buffer solution?

• The equilibrium position shifts to the left as H+ ions react with CH3COO- ions

• The pH increases due to the reaction with ethanoate ions

• The pH decreases due to the reaction with ethanoic acid

• The equilibrium position shifts to the right as H+ ions react with CH3COOH

What is the role of HCO3- ions in blood as a buffer?

• To keep the blood pH below 7

• To keep the blood pH between 7.35 and 7.45

• To increase the concentration of H+ ions in the blood

• To decrease the concentration of CO2 in the blood

What is the consequence of unregulated H+ ions in the blood?

• Hypotension

• Hypertension

• Alkalosis

• Acidosis

What happens when there is an increase in H+ ions in the blood?

• The concentration of H+ ions in the blood increases

• The concentration of H+ ions in the blood decreases

• The equilibrium position shifts to the right until equilibrium is restored

• The equilibrium position shifts to the left until equilibrium is restored

What is the equilibrium between CO2 and HCO3- important for?

• To control the oxygen levels in the blood

• To keep the blood pH constant

• To maintain the blood pressure

• To regulate the body temperature

What is the result of a decrease in H+ ions in the blood?

• The concentration of H+ ions in the blood decreases

• The equilibrium position shifts to the right until equilibrium is restored

• The equilibrium position shifts to the left until equilibrium is restored

• The concentration of H+ ions in the blood increases

What is the consequence of acidosis in the body?

• Body malfunctioning and coma

• Decreased heart rate

• Increased energy levels

• Improved immune system

What happens when OH- ions are added to a buffer solution?

• The pH decreases due to the reaction with ethanoic acid

• The pH increases due to the reaction with ethanoate ions

• The equilibrium position shifts to the left as OH- ions react with CH3COO- ions

• The equilibrium position shifts to the right as OH- ions react with CH3COOH