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18. A solution containing 10. mmol of 66629c1292a60.jpg and 5.0 mmol of 66629c1b783d3.jpg is titrated with 1.0 M HCl. What volume of HCl must be added to reach the first equivalence point?
(A) 5.0 mL
(B) 10.0 mL
(C) 15.0 mL
(D) 20.0 mL
(E) 25.0 mL



18. A solution containing 10. mmol of an..-阿摩線上測驗