A .
B .5.6×10-10
C .1.00×10-14
D .4.24×10-3
[单选题]已知下列各物质的Kb:①Ac-(5.9×10-10);②NH2NH2(3.0×10-8);③NH3(8×10-5);④S2-(Kb141,Kb27.7
[单选题]已知下列各物质的Kb:①Ac-(5.9×10-10);②NH2NH2(3.0×10-8);③NH3(8×10-5);④S2-(Kb141,Kb27.7
[判断题] 在氨水中存在NH3、NH4+、OH-、和NH4OH四种物质。A . 正确B . 错误
[单选题]已知下列各物质的Kb:①Ac-(5.9×10-10),②NH2NH2(3.0×10-8),③NH3(8×10-5),④S2-(Kb141,Kb27.7
[单选题]已知下列各物质的Kb:①Ac-(5.9×10-10),②NH2NH2(3.0×10-8),③NH3(8×10-5),④S2-(Kb141,Kb27.7
[单选题]已知下列各物质的Kb:①Ac-(5.9×10-10);②NH2NH2(3.0×10-8);③NH3(8×10-5);④S2-(Kb141,Kb27.7
[单选题]已知下列各物质的Kb:①Ac-(5.9×10-10);②NH2NH2(3.0×10-8);③NH3(8×10-5);④S2-(Kb141,Kb27.7
[单选题]已知(NH3)=1.77×10-5,用广泛pH试纸测定0.10mol·dm-3氨水溶液的pH值约是()。A . 13B . 12C . 14D . 11
[单选题]已知下列各物质的Kb:①Ac- (5.9×10-10),②NH3(8×10-5),③S2-(Kb1=41,Kb2=7.7×10-8),④NH2NH2(
[单选题]已知下列各物质的Kb:①Ac-(5.9×10-10),②NH3(8×10-5),③S2-(Kb1=41,Kb2=7.7×10-8),④NH2NH2(3