1. Suatu larutan asam asetat (Ka 2 x 10-5) mempunyai PH sama dengan larutan 2 x 10-3 M HCl.
Berapakah konsentrasi asam asetat tersebut?
Berapakah konsentrasi asam asetat tersebut?
Risep
PH sama berarti H⁺ nya sama
![[H^+]_{HCl}=[H^+]_{CH_3COOH} \\ \\ M_{HCl}= \sqrt{Ka.M} \\ \\ 2.10^{-3}= \sqrt{2.10^{-5}.M_{CH_3COOH}} \\ \\ 4.10^{-6}= 2.10^{-5}.M_{CH_3COOH} \\ \\ M_{CH_3COOH}=2.10^{-1}=0,2~M](https://tex.z-dn.net/?f=%5BH%5E%2B%5D_%7BHCl%7D%3D%5BH%5E%2B%5D_%7BCH_3COOH%7D+%5C%5C++%5C%5C+M_%7BHCl%7D%3D+%5Csqrt%7BKa.M%7D++%5C%5C++%5C%5C+2.10%5E%7B-3%7D%3D+%5Csqrt%7B2.10%5E%7B-5%7D.M_%7BCH_3COOH%7D%7D+%5C%5C++%5C%5C+4.10%5E%7B-6%7D%3D+2.10%5E%7B-5%7D.M_%7BCH_3COOH%7D+%5C%5C++%5C%5C+M_%7BCH_3COOH%7D%3D2.10%5E%7B-1%7D%3D0%2C2%7EM "[H^+]_{HCl}=[H^+]_{CH_3COOH} \\ \\ M_{HCl}= \sqrt{Ka.M} \\ \\ 2.10^{-3}= \sqrt{2.10^{-5}.M_{CH_3COOH}} \\ \\ 4.10^{-6}= 2.10^{-5}.M_{CH_3COOH} \\ \\ M_{CH_3COOH}=2.10^{-1}=0,2~M")
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