A.NaOH | B.氨水 | C.CuCl2 | D.CuO |
A.溶液中2c(Na+)=c(SO42-) | B.0<沉淀的物质的量<a/2 mol |
C.沉淀的物质的量a/2 mol | D.原溶液中c(H2SO4) =" a/2" mol/L |
A.同温度同物质的量浓度时,HF比HCN易电离,则NaF溶液的pH比NaCN溶液大 |
B.0.2 mol ·L![]() ![]() ![]() ![]() ![]() ![]() ![]() |
C.同浓度的下列溶液中,①NH4Al(SO4)2、②NH4Cl、③CH3COONH4、④NH3·H2O;c(NH![]() |
D.物质的量浓度相等的H2S和NaHS混合溶液中:c(Na![]() ![]() ![]() ![]() ![]() |
A.NaCl | B.NaF | C.NaAc | D.NaCN |
© 2017-2019 超级试练试题库,All Rights Reserved.