配平Na2Cr2O7+Na2S+H2O---Na2S2O3+NaOH+Cr(OH)3

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配平Na2Cr2O7+Na2S+H2O---Na2S2O3+NaOH+Cr(OH)3配平Na2Cr2O7+Na2S+H2O---Na2S2O3+NaOH+Cr(OH)3配平Na2Cr2O7+Na2S+

配平Na2Cr2O7+Na2S+H2O---Na2S2O3+NaOH+Cr(OH)3
配平Na2Cr2O7+Na2S+H2O---Na2S2O3+NaOH+Cr(OH)3

配平Na2Cr2O7+Na2S+H2O---Na2S2O3+NaOH+Cr(OH)3
4Na2Cr2O7+6Na2S+19H2O=3Na2S2O3+14NaOH+8Cr(OH)3