更新1:
The concentration of HCl in hydrochloric acid is reduced to 12% of its initial value by dilution. What is the difference in the pH values of the two solutions?
Chemistry Question?
回答 (1)
2016-11-23 7:49 am
Initial concentration of H₃O⁺ = [H₃O⁺]ₒ
Final concentration of H₃O⁺ = 12% × [H₃O⁺]ₒ
pH = -log[H₃O⁺]
Difference in pH
= {-log(12% × [H₃O⁺]ₒ)} - {-log[H₃O⁺]ₒ}
= -log(0.12) - log[H₃O⁺]ₒ + log[H₃O⁺]ₒ
= -log(0.12)
= 0.92
Final concentration of H₃O⁺ = 12% × [H₃O⁺]ₒ
pH = -log[H₃O⁺]
Difference in pH
= {-log(12% × [H₃O⁺]ₒ)} - {-log[H₃O⁺]ₒ}
= -log(0.12) - log[H₃O⁺]ₒ + log[H₃O⁺]ₒ
= -log(0.12)
= 0.92
收錄日期: 2021-04-18 15:51:24
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20161122213759AAn1Zvt