Respuesta :
Answer: 0.28 M ammonia + 0.35 M ammonium nitrate and 0.15 M nitrous acid + 0.14 M potassium nitrite
Explanation:
Buffer solution is the solution which resists the change in the magnitude of the pH when small additions of either acid or base is added.
Acidic Buffer solutions consist of weak acid and its conjugate base usually mixed in relatively equal and large quantities.
Basic Buffer solutions consist of weak base and its conjugate acid usually mixed in relatively equal and large quantities.
Thus 0.28 M ammonia + 0.35 M ammonium nitrate ( weak base + conjugate acid) and 0.15 M nitrous acid + 0.14 M potassium nitrite (weak acid + conjugate base) are good buffer systems
The aqueous solutions that are good buffer systems are:
- 0.28 M ammonia + 0.35 M ammonium nitrate.
- 0.15 M nitrous acid + 0.14 M potassium nitrite.
We want to determine which of the given solutions would make a good buffer.
What is a buffer?
A buffer is a solution used to resist abrupt changes in pH when an acid or a base is added.
What kinds of buffers exist?
- Acidic buffer: formed by a weak acid and its conjugate base.
- Basic buffer: formed by a weak base and its conjugate acid.
Which of the following aqueous solutions are good buffer systems?
- 0.24 M hydrochloric acid + 0.23 M sodium chloride. No, since HCl is a strong acid.
- 0.28 M ammonia + 0.35 M ammonium nitrate. Yes, it would be a good basic buffer.
- 0.16 M barium hydroxide + 0.28 M barium bromide. No, since Ba(OH)₂ is a strong base.
- 0.15 M nitrous acid + 0.14 M potassium nitrite. Yes, it would be a good acidic buffer.
- 0.35 M calcium nitrate + 0.21 M calcium iodide. No, since no acids nor bases are present.
The aqueous solutions that are good buffer systems are:
- 0.28 M ammonia + 0.35 M ammonium nitrate.
- 0.15 M nitrous acid + 0.14 M potassium nitrite.
Learn more about buffers here: brainly.com/question/24188850
