现有碳酸钾和碳酸氢钾的混合物样品,为测定其组成,分别称取三份不同质量的该混合物样品,配成溶液,然后用相同浓度的硫酸进行滴定,已知:\(\rm{CO\rlap{_{3}}{^{2-}}}\)与\(\rm{H^{+}}\)反应生成\(\rm{CO_{2}}\)分两步:\(\rm{CO\rlap{_{3}}{^{2-}}+H^{+}═══HCO\rlap{_{3}}{^{-}}}\),\(\rm{HCO\rlap{_{3}}{^{-}}+H^{+}═══CO_{2}↑+H_{2}O}\),测得实验数据如下:
实验编号 | \(\rm{1}\) | \(\rm{2}\) | \(\rm{3}\) |
混合物的质量\(\rm{/g}\) | \(\rm{3.76}\) | \(\rm{4.70}\) | \(\rm{8.46}\) |
硫酸溶液的体积\(\rm{/mL}\) | \(\rm{50.00}\) | \(\rm{50.00}\) | \(\rm{50.00}\) |
生成二氧化碳的物质的量\(\rm{/mol}\) | \(\rm{0.03}\) | \(\rm{0.0375}\) | \(\rm{0.03}\) |
下列说法正确的是\(\rm{(}\) \(\rm{)}\)