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Determine the Ka value of acetic acid at 105 degrees C from the following data: A 0.3 Molar aqueous solution of acetic acid shows a pH of 2.642 at 105 degrees C. You can use the approximation formula here because the concentration of the acetic acid is quite high.
1. Ka = 1.70 x 10^-5
2. Ka = 1.73 x 10^-5
3. Ka = 1.81 x 10^-5
4. Ka = 1.83 x 10^-5
5. Ka = 1.87 x 10^-5
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