题目内容
Complete the notes about Michela’s typical day.7:00 –get up, get the kids ready8:30 –9:00 –12:00 –14:30 –
查看答案
搜索结果不匹配？点我反馈
更多问题
How long has she been with her current employer?How long has she beenhome-working?
Is she doing anything different from normal this week?
用重铬酸钾法测定亚铁盐中的铁（用容量瓶配置样品溶液，以二苯胺磺酸钠为指示剂），如果滴定管未洗净，滴定时管内壁挂有液滴，将导致测定结果偏_________,如果不加H3PO4, 将导致测定结果偏___________.
用K2Cr2O7滴定Fe2＋时，常用H2SO4－H3PO4混合酸作介质，加入H3PO4的主要作用是（）
微信支付 
支付宝支付