24小时热门版块排行榜    

查看: 712  |  回复: 1
本帖产生 1 个 翻译EPI ,点击这里进行查看
当前只显示满足指定条件的回帖,点击这里查看本话题的所有回帖

zerohead

禁虫 (职业作家)

Evan2008(金币+10, 翻译EPI+1):非常感谢 2010-07-07 11:03:16
Take 2g (precise to 0.0001g) of the sample which was dried at 110℃±2℃ until constant weight. Then dissolve the sample into 100ml anhydrous carbon dioxide. Finally conduct titration with standard chloride acid solution (c=0.5mol/L) until the pH value equals 4.2.

The mass of disodium hydrogen phosphate, in percentage, can be calculated by Equation (1).

Xxxx

in which,
  V is the volume of chloride acid, mL
  C is the concentration of chloride acid, mol/L
  M is the molar mass of disodium hydrogen phosphate, g/mol
  M is the mass of the sample, g
2楼2010-07-06 19:07:45
已阅   关注TA 给TA发消息 送TA红花 TA的回帖
相关版块跳转 我要订阅楼主 Evan2008 的主题更新
信息提示
请填处理意见