1. What is the [H3O+] of a solution if its pH =8.7?
Answer in units of M.
2. What is the [OH−] of a solution if its pH =8.7?
Answer in units of M.
chem help?
2017-01-15 11:44 pm
回答 (1)
2017-01-16 1:19 am
1.
pH = 8.7
[H₃O⁺] = 10^(-pH) = 10^(-8.7) M = 2.0 × 10^(-9) M
2.
pH = 8.7
[H₃O⁺] = 10^(-pH) = 10^(-8.7) M = 2.0 × 10^(-9) M
[OH⁻] = Kw / [H₃O⁺] = [1.0 × 10^(-14)] / [2.0 × 10^(-9)] = 5.0 × 10^(-6) M
OR :
pH = 8.7
pOH = pKw - pH = 14.0 - 8.7 = 5.3
[OH⁻] = 10^(-pOH) = 10^(-5.3) = 5.0 × 10^(-6) M
pH = 8.7
[H₃O⁺] = 10^(-pH) = 10^(-8.7) M = 2.0 × 10^(-9) M
2.
pH = 8.7
[H₃O⁺] = 10^(-pH) = 10^(-8.7) M = 2.0 × 10^(-9) M
[OH⁻] = Kw / [H₃O⁺] = [1.0 × 10^(-14)] / [2.0 × 10^(-9)] = 5.0 × 10^(-6) M
OR :
pH = 8.7
pOH = pKw - pH = 14.0 - 8.7 = 5.3
[OH⁻] = 10^(-pOH) = 10^(-5.3) = 5.0 × 10^(-6) M
收錄日期: 2021-04-18 15:59:45
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https://hk.answers.yahoo.com/question/index?qid=20170115154403AAbXUVG