Understanding Buffer Solutions

What happens to the pH of a solution when a small amount of acid is added to a buffer solution?

• The solution turns red.

• The pH remains roughly the same.

• The pH decreases significantly.

• The pH increases significantly.

What is the role of a buffer solution?

• To maintain the solution at a neutral pH.

• To change the color of the solution.

• To resist changes in pH when acids or alkalis are added.

• To fully dissociate in water.

What does the universal indicator do when an acid is added to a neutral solution?

• It turns red.

• It turns blue.

• It remains green.

• It has no change.

What are the two main ingredients in a buffer solution?

• A salt and water.

• An alkali and a neutral solution.

• A weak acid and its conjugate base.

• A strong acid and a strong base.

What happens when a small amount of alkali is added to a buffer solution?

• The pH increases significantly.

• The pH decreases significantly.

• The solution turns blue.

• The pH remains roughly the same.

What is represented by 'HA' in the context of buffer solutions?

• A strong acid.

• A strong base.

• Water.

• Any weak acid.

What does the 'A-' represent in the context of buffer solutions?

• A strong acid.

• A conjugate acid.

• A neutral molecule.

• A conjugate base.

Why is the equilibrium of a weak acid in a buffer solution mostly towards the left-hand side?

• Because it is a strong acid.

• Because it reacts with water.

• Because it fully dissociates.

• Because it partially dissociates.

What happens when a soluble salt of a weak acid is added to a buffer solution?

• It turns the solution red.

• It increases the pH significantly.

• It decreases the pH significantly.

• It helps to maintain the pH by providing more conjugate base.

What is the effect of adding an enormous amount of acid or alkali to a buffer solution?

• It has no effect on the buffer solution.

• It overwhelms the buffer capacity, changing the pH.

• It turns the solution neutral.

• It changes the color of the solution.