用0.1mol/L的NH4Cl和0.1mlo/L的氨水配置50mL,pH为10的缓冲溶液,需氨水
问题描述:
用0.1mol/L的NH4Cl和0.1mlo/L的氨水配置50mL,pH为10的缓冲溶液,需氨水
答
PH=14-PKb+lg[NH3H2O]/[NH4+]
10=14-4.75+lg[NH3H2O]/[NH4+]
lg[NH3H2O]/[NH4+]=0.75
[NH3H2O]/[NH4+]=5.6/1
需要0.1mol/L的氨水50×5.6/6.6=42.4ml