【单选题】"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...
C.
C NaOH =0.13935 mol /L
【单选题】When ______your mother take a shower?
【简答题】Text 4 As the twentieth century began, the importance of formal education in the United States increased. The frontier had mostly disappeared and by 1910 most Americans lived in towns and cities. Indu...
【简答题】TEXT B Considering that anxiety makes your palms sweat, your heart race, and your brain seize up like a car with a busted transmission, it's no wonder people reach for the Xanax to vanquish it. But in...
【单选题】根据下列内容,回答题。 患者女性,45岁,因蛛网膜下腔出血,昏迷3天,经抢救后病情渐稳定,现持续输液,鼻饲供给营养。 为患者插入鼻饲管至会厌部时,托起头部,使其下颌靠近胸骨柄的目的是 查看材料
【单选题】用 作为基准物质标定0.10 mol/L的KMnO4溶液浓度时,滴定时选用的指示剂是( )
【单选题】标定 0.10 mol/LNaOH ,用草酸( H 2 C 2 O 4 90.04 ) 作基准物质, 精密称取 0.1636 g 的基准物质草酸,溶解后,以酚酞为指示剂,用 NaOH 滴定至终点,用去 26.06 mL 反应式为: H 2 C 2 O 4 +2 NaOH=Na 2 C 2 O 4 +2H 2 O 计算公式 计算 C NaOH 应是:
C.
C NaOH =0.13935 mol /L