A、K<sub>2sub>CrO<sub>7sub> B、K<sub>2sub>Cr<sub>2sub>O6 C、K<sub>2sub>CrO<sub>4sub> D、K<sub>2sub>Cr<sub>2sub>O<sub>7sub>
A、K<sub>2sub>CrO<sub>7sub> B、K<sub>2sub>Cr<sub>2sub>O6 C、K<sub>2sub>CrO<sub>4sub> D、K<sub>2sub>Cr<sub>2sub>O<sub>7sub>
A、应用范围广 B、K<sub>2sub>Cr<sub>2sub>O<sub>7sub>溶液稳定 C、K<sub>2sub>Cr<sub>2sub>O<sub>7sub>无公害 D、K<sub>2sub>Cr<sub>2sub>O<sub>7sub>易于提纯 E、在稀盐酸溶液中,不受Cl<sup>-sup>影响
A、Na<sub>2sub>S<sub>2sub>O<sub>3sub> B、NaNO<sub>3sub> C、K<sub>2sub>Cr<sub>2sub>O<sub>7sub> D、KMnO<sub>4sub>
A、将AgN0<sub>3sub>滴定液装在碱式滴定管中 B、将K<sub>2sub>Cr<sub>2sub>O<sub>7sub>滴定液装在碱式滴定管中 C、以K<sub>2sub>Cr<sub>2sub>O<sub>7sub>标定Na<sub>2sub>S<sub>2sub>0<sub>3sub>溶液时用碘量瓶 D、上述滴定(C)中,淀粉指示剂宜在近终点时加入 E、用EDTA滴定液直接滴定Al<sup>3+sup>时,滴定速度应快
A、K<sub>2sub>Cr<sub>2sub>O<sub>7sub> B、Na<sub>2sub>S<sub>2sub>O<sub>3sub> C、I<sub>2sub> D、KMnO<sub>4sub>
A、K<sub>1sub>+K<sub>2sub> B、K<sub>1sub>-K<sub>2sub> C、K<sub>1sub>·K<sub>2sub> D、K<sub>1sub>/K<sub>2sub>
A、KMnO<sub>4sub> B、K<sub>2sub>Cr<sub>2sub>O<sub>7sub> C、Na<sub>2sub>S<sub>2sub>O<sub>3sub> D、NH<sub>4sub>SCN
A、K<sub>1sub>+K<sub>2sub> B、K<sub>1sub>-K<sub>2sub> C、K<sub>1sub>·K<sub>2sub> D、K<sub>1sub>/K<sub>2sub>
A、K<sub>2sub>Cr<sub>2sub>O<sub>7sub> B、Na<sub>2sub>S<sub>2sub>O<sub>3sub> C、Zn D、H<sub>2sub>C<sub>2sub>O<sub>4sub>·2H<sub>2sub>O
A、A<sub>1sub>-A<sub>2sub> B、(A<sub>1sub>-A<sub>2sub>)K<sub>ssub> C、(A<sub>1sub>-A<sub>2sub>)/K′<sub>ssub> D、(A<sub>1sub>-A<sub>2sub>)K<sub>ssub>/K′<sub>ssub>