In alkaline buffer solution containing NH4OH and NH4Cl , if some HCl is added its pH will
Correct answer: B. decrease a little
- A. increase a little
- B. decrease a little
- C. remains constant
- D. change but cannot be predicted
Explanation
In an alkaline buffer solution with NH4OH and NH4Cl, the NH4OH acts as a base, and NH4Cl serves as its conjugate acid. When a small amount of HCl is added, it reacts with the NH4OH, forming NH4Cl and water. This reaction consumes some of the NH4OH, causing a slight decrease in the concentration of hydroxide ions (OH⁻) and, consequently, a decrease in pH. The buffer's capacity to resist pH changes, however, prevents a significant drop in pH.
Last updated
Related questions
0.1 M HCl has pH = 1.0, it is about 100 times stronger than nitric acid. Then pH of acetic acid will be
1.0 M solution of NaOH is mixed with 1.0 M solution of H₂SO₄+ the solution formed is:
100 ml of each of 0.5 N NaOH, N/5 HCl and N/10 H2SO4 are mixed together. The resulting solution will be:
100 ml of N/5 NaOH will neutralize:
25 ml of a solution of barium hydroxide on titration with a 0.1 molar solution of hydrochloric acid gave a titre value of 35ml. The molarity of barium hydroxide solution was: