Acid-Base Chemistry Concepts

The video tutorial covers the identification of a hydronium ion, explaining why it is not a water molecule. It discusses the characteristics of acids, emphasizing that they are proton donors. The tutorial also clarifies that a hydrogen ion is essentially a proton, having lost its electron. Finally, it provides a detailed guide on writing K expressions for various ionization reactions, including those involving H2SO3, HCO3, and methanoic acid.

What is the species in the diagram with three hydrogen atoms and one oxygen atom?

• Water molecule

• Hydrogen oxide

• Hydronium ion

• Charged water molecule

What is the formula for the hydronium ion?

• H3O+

• H2O2

• OH-

• H2O

Which of the following is a characteristic of an acid?

• Proton acceptor

• Electron donor

• Proton donor

• Neutron donor

Which of the following is not a characteristic of a base?

• Proton donor

• Proton acceptor

• Electron donor

• Neutron donor

A hydrogen ion is equivalent to which subatomic particle?

• Proton

• Electron

• Neutron

• Positron

What happens to a hydrogen atom when it becomes a hydrogen ion?

• Gains an electron

• Loses a proton

• Loses an electron

• Gains a neutron

What is the first step in writing the K expression for H2SO3?

• Divide the concentration of products

• Multiply the concentration of reactants

• Write the chemical equation

• Write the concentration of water

In the ionization of H2SO3, how many hydrogens are lost in the first ionization step?

• Three

• None

• Two

• One

What is the product formed when HCO3- reacts with water?

• Carbonate ion and water

• Hydronium ion and bicarbonate ion

• Bicarbonate ion and water

• Hydronium ion and carbonate ion

Which of the following is the correct K expression for methanoic acid?

• Concentration of reactants divided by products

• Concentration of products divided by reactants

• Sum of concentrations of reactants and products

• Difference of concentrations of reactants and products