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A 0.Sos gram sample of an unknown monoprotic acid is dissolved in 50.0 mL of water and titrated with a a 0.372 M aqueous sodium hydroxide solution. It is observed that after 15.0 milliliters of sodium hydroxide have been added, the pH is 5.053 and that an additional 6.90 mL of the sodium hydroxide solution is required to reach the equivalence point. (1) What is the molecular weight of the acid? g/mol (2) What is the value of Ka for the acid?

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HA o-3チ2X 21-9 0.162436 M SO.0 0.84凸 Molar man (Molecolar wei 8나)-ma-ai46@no 110.227 g/m以 Nuw.bw 엄 mmoL 엌 HA γ1wdalni oL ะ 0-

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