更多“某一含有Na<sub>2</sub>CO<sub>3</sub>、NaHCO<sub>3</sub>及杂质的试样，加水溶解，用0.2120mol.L<sup>-1</sup>HCl溶液滴定至酚酞终点，用去20.50mL；继续滴定至甲基橙终点，又用去24.08mL。求Na<sub>2</sub>CO<sub>3</sub>和NaHCO<sub>3</sub>的质量分数。”相关的问题
A、NaHCO<sub>3sub>、NaH<sub>2sub>PO<sub>4sub> B、Na<sub>2sub>CO<sub>3sub>、NaH<sub>2sub>PO<sub>4sub> C、NaHCO<sub>3sub>、Na<sub>2sub>HPO<sub>4sub> D、Na<sub>2sub>CO<sub>3sub>、Na<sub>2sub>HPO<sub>4sub>
A、标准状况下，22.4LH<sub>2sub>O含有的分子数为NA B、常温常压下，1.06gNa<sub>2sub>CO<sub>3sub>含有的Na+离子数为0.02N<sub>Asub> C、通常状况下，N<sub>Asub>个CO<sub>2sub>分子占有的体积为22.4L D、物质的量浓度为1.5mollL的MgCl<sub>2sub>溶液中，含有Cl-数为3N<sub>Asub>
A、H<sub>2sub>SO<sub>4sub>Na<sub>2sub>CO<sub>3sub>BaCl<sub>2sub>HCl B、HClH<sub>2sub>SO<sub>4sub>Na<sub>2sub>CO<sub>3sub>BaCl<sub>2sub> C、Na<sub>2sub>CO<sub>3sub>H<sub>2sub>SO<sub>4sub>HClBaCl<sub>2sub> D、BaCl<sub>2sub>HClNa<sub>2sub>CO<sub>3sub>H<sub>2sub>SO<sub>4sub>
A、NaOH+Na<sub>2sub>CO<sub>3sub> B、NaOH+NaHCO<sub>3sub> C、NaHCO<sub>3sub>+Na<sub>2sub>CO<sub>3sub> D、Na<sub>2sub>CO<sub>3sub>
A、NaOH+Na<sub>2sub>CO<sub>3sub> B、NaHCO<sub>3sub> C、Na<sub>2sub>CO<sub>3sub>+NaHCO<sub>3sub> D、Na<sub>2sub>CO<sub>3sub>
A、NaCl和NaOH B、Na<sub>2sub>CO<sub>3sub>和CaCl<sub>2sub> C、Na<sub>2sub>CO<sub>3sub>和NH<sub>4sub>Cl D、NaHCO<sub>3sub>和NH<sub>4sub>Cl
A、NaCl和NaOH B、Na<sub>2sub>CO<sub>3sub>和CaCl<sub>2sub> C、Na<sub>2sub>CO<sub>3sub>和NH<sub>4sub>Cl D、NaHCO<sub>3sub>和NH<sub>4sub>Cl
A、Na<sub>2sub>SO<sub>4sub>、BaCl<sub>2sub>、NaOH B、Na<sub>2sub>SO<sub>4sub>、CuCl<sub>2sub>、HNO<sub>3sub> C、Na<sub>2sub>SO<sub>4sub>、CuCl<sub>2sub>、NaOH D、Na<sub>2sub>CO<sub>3sub>、CuSO<sub4sub>、H<sub>2sub>SO<sub>4sub>sub4sub>
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