Mastering Buffer Solutions in Chemistry

This video tutorial explains buffer solutions, which resist pH changes within a specific range. It details the components needed to create a buffer, emphasizing the necessity of a weak acid or base and its conjugate salt. The video also provides examples to help identify buffer solutions, focusing on the criteria of having weak substances and conjugate pairs.

What is the primary function of a buffer solution?

• To change the pH of a solution rapidly

• To resist changes in pH within a specific range

• To neutralize strong acids

• To increase the acidity of a solution

Which of the following is necessary to create a buffer solution?

• A neutral compound

• A strong base and its conjugate acid

• A weak acid or base and its conjugate salt

• A strong acid and its salt

What defines a conjugate pair in chemistry?

• Compounds that differ by one proton

• Compounds that have the same number of protons

• Compounds that differ by one electron

• Compounds that have identical molecular weights

Why can't HCl be used to make a buffer solution?

• It does not form salts

• It is a strong acid

• It is a weak acid

• It is not soluble in water

Which of the following is a weak acid suitable for buffer solutions?

• HCl

• HNO2

• NaOH

• H2SO4

What is the conjugate base of HF in a buffer solution?

• F-

• OH-

• Cl-

• H+

Which of the following pairs can form a buffer solution?

• H2SO4 and Na2SO4

• NaOH and NaCl

• NH3 and NH4Cl

• HCl and NaCl

What is the role of a conjugate acid in a buffer solution?

• To decrease the pH

• To neutralize added acid

• To increase the pH

• To neutralize added base

Which of the following is a weak base that can be used in a buffer solution?

• HCl

• H2O

• NaOH

• NH3

What happens when a buffer solution is added to a strong acid?

• The pH changes drastically

• The buffer neutralizes the acid, minimizing pH change

• The buffer evaporates

• The buffer becomes a strong acid