A:向氯化铝溶液中加入过量氨水:Al3++4NH3•H2O=AlO2﹣+4NH4++2H2O
B:明矾净水的原理是明矾溶于水后电离出的Al3+水解生成Al(OH)3胶体:Al3+ + 3H2O = Al(OH)3↓+ 3H+
C:向硫酸铁溶液中滴加硫氰化钾溶液:Fe3++3SCN﹣=Fe(SCN)3↓
D:向酸性FeCl2溶液中加入H2O2:2Fe2++H2O2+2H+=2Fe3++2H2O
关于声现象,下列说法正确的是
日本领土主要包括四大岛屿,其中面积最大的是( )
Reading her biography, I was lost in admiration for _______ Doris Lessing had achieved in literature.