Understanding pH and Acids

The video tutorial explains how to calculate the pH of a 0.03 molar solution of hydrochloric acid (HCL). It begins by identifying HCL as a strong acid that dissociates completely into hydrogen ions (H+) and chloride ions (Cl-). The pH is calculated by taking the negative logarithm of the hydrogen ion concentration, which is 0.03 molar. The resulting pH is 1.5, confirming the acidic nature of the solution. The tutorial concludes with a brief summary of the calculation process.

What characteristic of hydrochloric acid makes it dissociate completely in water?

• It is a strong acid.

• It is a base.

• It is a weak acid.

• It is a neutral compound.

What is the formula used to calculate the pH of a solution?

• pH = log(concentration of H+)

• pH = concentration of H+

• pH = -concentration of H+

• pH = -log(concentration of H+)

If the concentration of H+ ions in a solution is 0.03 M, what is the pH?

• 1.5

• 3.0

• 0.03

• 7.0

Why is the pH of hydrochloric acid expected to be below 7?

• Because it is an acid.

• Because it is neutral.

• Because it is a salt.

• Because it is a base.

What is the pH of a 0.03 molar solution of HCl?

• 7.0

• 3.0

• 0.03

• 1.5