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100 mL of a buffer that consists of 0.20 M NH3 and 0.20 M NH4Cl is titratd iwth 25 mL of 0.20 M HCl. Calculate the pH of the resulting solution givent aht the Kb for NH3 is 1.8×10^-5. (A). 4.97 (B). 9.03 (C). 9,26 (D). 4.74 (E). 9.48