下列各组溶液能组成缓冲溶液:( )
A: 1:1的Na[img=7x22]1803dd61e665865.png[/img]CO[img=7x22]1803dd61ef45c09.png[/img] — NaOH 混合液
B: 1:1的NaHCO[img=7x22]1803dd61ef45c09.png[/img] — Na[img=7x22]1803dd61e665865.png[/img]CO[img=7x22]1803dd61ef45c09.png[/img] 混合液
C: 1:1的NaHCO[img=7x22]1803dd61ef45c09.png[/img] — NaOH 混合液
D: 1:1的Na[img=7x22]1803dd61e665865.png[/img]CO[img=7x22]1803dd61ef45c09.png[/img]—HCl 混合液
A: 1:1的Na[img=7x22]1803dd61e665865.png[/img]CO[img=7x22]1803dd61ef45c09.png[/img] — NaOH 混合液
B: 1:1的NaHCO[img=7x22]1803dd61ef45c09.png[/img] — Na[img=7x22]1803dd61e665865.png[/img]CO[img=7x22]1803dd61ef45c09.png[/img] 混合液
C: 1:1的NaHCO[img=7x22]1803dd61ef45c09.png[/img] — NaOH 混合液
D: 1:1的Na[img=7x22]1803dd61e665865.png[/img]CO[img=7x22]1803dd61ef45c09.png[/img]—HCl 混合液
举一反三
- 下列各混合溶液不能组成缓冲溶液的是( )。 A: NH[img=7x22]1803dd4c11c2101.png[/img]Cl-NH[img=12x22]1803dd4c19b99ae.png[/img]H[img=7x22]1803dd4c22644eb.png[/img]O B: HAC-NaAc C: NaHCO[img=7x22]1803dd4c2b617f6.png[/img]-Na[img=7x22]1803dd4c33bce0c.png[/img]CO[img=7x22]1803dd4c3be8547.png[/img] D: NH[img=7x22]1803dd4c4444e61.png[/img]Cl-HCN
- 属于两性物质的有( )。 A: NaHCO[img=7x22]1803dd61b917d4d.png[/img] B: Na[img=7x22]1803dd61c1e5610.png[/img]CO[img=7x22]1803dd61cb600fa.png[/img] C: NH[img=7x22]1803dd61d4b5e30.png[/img]AC D: NH[img=7x22]1803dd61dda7f09.png[/img]Cl
- 假定Sb[img=7x22]1803dd49c179016.png[/img]S[img=7x22]1803dd49c99e260.png[/img](s)的溶解度为x mol·L[img=17x22]1803dd49d248c3b.png[/img],则[img=28x28]1803dd49dafed3c.png[/img]应为( )。 A: [img=28x28]1803dd49e3a9672.png[/img]=x[img=7x22]1803dd49ec515a7.png[/img]·x[img=7x22]1803dd49f5a7624.png[/img]= x[img=7x22]1803dd49fdc3ba4.png[/img] B: [img=28x28]1803dd4a062ad6a.png[/img]=2x·3x=6x[img=7x22]1803dd4a0f09d1e.png[/img] C: [img=28x28]1803dd4a062ad6a.png[/img]=x[img=7x22]1803dd4a0f09d1e.png[/img] D: [img=28x28]1803dd4a062ad6a.png[/img]=(2x)[img=7x22]1803dd4a323468e.png[/img]·(3x)[img=7x22]1803dd4a3a6fefa.png[/img]=108x[img=7x22]1803dd4a4341475.png[/img]
- 欲分离AgCl、AgBr、AgI,并使之变成溶液,需使用的试剂和先后次序是( )。 A: NH[img=7x22]1803dd512fac4af.png[/img],Na[img=7x22]1803dd5138ffb2f.png[/img]S[img=7x22]1803dd5142ad173.png[/img]O[img=7x22]1803dd514c57a96.png[/img],KCN B: KCN,NH[img=7x22]1803dd512fac4af.png[/img],Na[img=7x22]1803dd5138ffb2f.png[/img]S[img=7x22]1803dd5142ad173.png[/img]O[img=7x22]1803dd514c57a96.png[/img] C: Na[img=7x22]1803dd5138ffb2f.png[/img]S[img=7x22]1803dd5142ad173.png[/img]O[img=7x22]1803dd514c57a96.png[/img],NH[img=7x22]1803dd512fac4af.png[/img],KCN D: KCN,Na[img=7x22]1803dd5138ffb2f.png[/img]S[img=7x22]1803dd5142ad173.png[/img]O[img=7x22]1803dd514c57a96.png[/img],NH[img=7x22]1803dd512fac4af.png[/img]
- 四异硫氰根·二氨合钴(Ⅲ)酸铵的化学式是( )。 A: (NH[img=7x22]1803dd4f25939a1.png[/img])[img=7x22]1803dd4f2ebfafc.png[/img][Co(SCN)[img=7x22]1803dd4f36f65fc.png[/img](NH[img=7x22]1803dd4f4053c5b.png[/img])[img=7x22]1803dd4f48e9065.png[/img]] B: (NH[img=7x22]1803dd4f510f758.png[/img])[img=7x22]1803dd4f59ada5f.png[/img][Co(NH[img=7x22]1803dd4f620db59.png[/img])[img=7x22]1803dd4f6ba977d.png[/img](SCN)[img=7x22]1803dd4f74a2468.png[/img]] C: NH[img=7x22]1803dd4f510f758.png[/img][Co(NCS)[img=7x22]1803dd4f74a2468.png[/img](NH[img=7x22]1803dd4f620db59.png[/img])[img=7x22]1803dd4f6ba977d.png[/img]] D: NH[img=7x22]1803dd4f510f758.png[/img][Co(NH[img=7x22]1803dd4f620db59.png[/img])[img=7x22]1803dd4f6ba977d.png[/img](NCS)[img=7x22]1803dd4f74a2468.png[/img]]