试样的酸熔法常用的熔剂为K<sub>2</sub>CO<sub>3</sub>。
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A、K257;<sub>1sub>=K257;<sub>2sub> B、K257;<sub>1sub>=2K257;<sub>2sub> C、K257;<sub>1sub>=1/2K257;<sub>2sub> D、K257;<sub>1sub>=(K257;<sub>2sub>)2
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-影响
A、k<sub>1sub>[A]-k<sub>2sub>[D][B] B、k<sub>1sub>[A]-k<sub>-1sub>[B]-k<sub>2sub>[D][B] C、k<sub>1sub>[A]-k<sub>-1sub>[B]+k<sub>2sub>[D][B] D、-k<sub>1sub>[A]+k<sub>-1sub>[B]+k<sub>2sub>[D][B]
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>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、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>