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urgent , please solve fast and correctly To prepare a buffer solution with pH = 2.6, using one of the following weak acids: HA (Ka=2.710-5),

urgent , please solve fast and correctly

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To prepare a buffer solution with pH = 2.6, using one of the following weak acids: HA (Ka=2.710-5), HB (Ka=4.410), HC (Ka=2.610-9) 0r HD (Ka=2.510-12). Which acid should be chosen? (A) HD (B) HB HC HA

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