"Times New Roman";mso-bidi-font-weight:bold">标定 0.10 mol/LNaOH mso-bidi-font-weight:bold">,用草酸( H 2 C 2 O 4 90.04 mso-hansi-font-family:"Times New Roman";mso-bidi-font-weight:bold">) 作基准物质, "Times New Roman";mso-bidi-font-weight:bold">精密称取 0.1636 g mso-bidi-font-weight:bold">的基准物质草酸,溶解后,以酚酞为指示剂,用 NaOH mso-bidi-font-weight:bold">滴定至终点,用去 26.06 mL mso-hansi-font-family:"Times New Roman";mso-bidi-font-weight:bold">反应式为: H 2 C 2 O 4 +2 NaOH=Na 2 C 2 O 4 +2H 2 O "Times New Roman";mso-bidi-font-weight:bold">计算公式 计算 C NaOH 应是: