Ask Question
5 September, 13:44

Which of the following aqueous solutions are good buffer systems?

.

0.11 M sodium hydroxide + 0.30 M sodium bromide

0.33 M potassium chloride + 0.20 M calcium chloride

0.28 M nitric acid + 0.23 M sodium nitrate

0.31 M ammonia + 0.31 M calcium hydroxide

0.21 M hydrofluoric acid + 0.20 M potassium fluoride

+5
Answers (1)
  1. 5 September, 13:45
    0
    Buffer is composed of weak acid and its conjugate base or weak base and it is conjugate acid. so The correct answer is:

    0.21 M hydrofluoric acid + 0.20 M potassium Fluoride

    due to the first choice contain NaOH which is strong base not weak

    second choice both salts no acid or base

    Third choice contain HNO₃ which is considered as strong acid

    Fourth choice contain ammonia but without its conjugate acid like (NH₄Cl for example) instead it has different salt

    Fifth Choice contain HF which is weak acid and KF which is its conjugate base so this is the correct one
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “Which of the following aqueous solutions are good buffer systems? . 0.11 M sodium hydroxide + 0.30 M sodium bromide 0.33 M potassium ...” in 📗 Chemistry if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers