用过量的H2SO4、NaOH、NH3·H2O、NaCl等溶液,按下列步骤分离五种离子,则溶液①、②、③、④是 ( )
A.①NaCl ②NaOH ③NH3·H2O ④H2SO4 |
B.①H2SO4 ②NaOH ③NH3·H2O ④NaCl |
C.①H2SO4 ②NH3·H2O ③NaOH ④NaCl |
D.①NaCl ②NH3·H2O ③NaOH ④H2SO4 |
用过量的H2SO4、NaOH、NH3·H2O、NaCl等溶液,按下列步骤分离五种离子,则溶液①、②、③、④是 ( )
A.①NaCl ②NaOH ③NH3·H2O ④H2SO4 |
B.①H2SO4 ②NaOH ③NH3·H2O ④NaCl |
C.①H2SO4 ②NH3·H2O ③NaOH ④NaCl |
D.①NaCl ②NH3·H2O ③NaOH ④H2SO4 |