Carbonic Acid and Equilibrium Concepts

The video tutorial explains how to write the equilibrium constant expression for the reaction of carbonic acid (H2CO3) with water. It describes the reaction process, highlighting the role of carbonic acid as a weak acid and its interaction with water to form hydronium ions and bicarbonate ions. The tutorial further details how to write the KA expression, emphasizing the importance of excluding water from the expression due to its constant concentration.

What is the main focus of the equilibrium constant expression in the reaction of carbonic acid with water?

• The concentration of hydronium ions

• The concentration of carbonic acid

• The concentration of water

• The concentration of oxygen

In the reaction process, what role does carbonic acid play?

• It acts as a solvent

• It acts as a catalyst

• It acts as a base

• It acts as an acid

What is formed when carbonic acid donates a proton to water?

• Carbonate ion

• Hydroxide ion

• Hydronium ion

• Bicarbonate ion

What happens to the charge of the bicarbonate ion after the reaction?

• It becomes positive

• It remains neutral

• It becomes negative

• It becomes double positive

Which side does the equilibrium favor in the reaction of carbonic acid with water?

• The side with less ions

• The side with strong acid and water

• The side with more ions

• The side with weak acid and water

How is the equilibrium constant expression (Ka) written for this reaction?

• Difference between products and reactants

• Products over reactants

• Reactants over products

• Sum of products and reactants

What is the stoichiometric coefficient for each component in the Ka expression?

• 2

• 1

• 0

• 3

Why is water not included in the Ka expression?

• Because it is a solid

• Because it is a gas

• Because its concentration is constant

• Because it is a reactant

What is the state of water in the reaction?

• Aqueous

• Solid

• Liquid

• Gas

Which component's concentration is not considered in the equilibrium constant expression?

• Carbonic acid

• Hydronium ion

• Water

• Bicarbonate ion