2009 National Question 2 Single-choice Differentiating 2009_全国卷 (化学) 2.(5分)将15mL 2mol•L ﹣1 Na 2CO3溶液逐滴加入到40mL 0.5mol•L ﹣1MCln盐溶液中,恰好将溶液中的Mn+离子完全沉淀为碳酸盐,则MCln中n值是( ) A. 4B. 3C. 2D. 1 Answer keyB ☆ SaveCan't do it, show the explanation查看原卷 →