ZnCl2溶液中加入少量NH3H2O,产生白色沉淀,再过量NH3H2O,至沉淀溶解,加入铬黑T(EBT)溶液呈红色,再加EDTA溶液,则溶液由红变蓝,由此可()。A、lgZn<lgKZn(EBT)<lgKZnYB、lgKZn(NH3)lgKZn(EBT)lgKZnYC、lgKZn(EBT)<lgKZn(NH3)<lgKZnYD、lgKZn(EBT)≈lgKZn(NH3)≈lgKZnYE、lgKZnYZn(EBT)Zn(NH3)
ZnCl2溶液中加入少量NH3H2O,产生白色沉淀,再过量NH3H2O,至沉淀溶解,加入铬黑T(EBT)溶液呈红色,再加EDTA溶液,则溶液由红变蓝,由此可()。
- A、lgZn<lgKZn(EBT)<lgKZnY
- B、lgKZn(NH3)>lgKZn(EBT)>lgKZnY
- C、lgKZn(EBT)<lgKZn(NH3)<lgKZnY
- D、lgKZn(EBT)≈lgKZn(NH3)≈lgKZnY
- E、lgKZnY
Zn(EBT) Zn(NH3)
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