Soil Chemistry problem


A recipe for preparing a soil extractant solution specifies that you add 1g of sodium dithionite (Na2S2O4) to 200 ml of a solution of 0.2 M sodium citrate. Assuming that tge final volume remains 200 ml what is the final molar concentration of citrate, dithionite (S2O4) and sodium in this solution? Atomic weighh : Na,22.9 g/moles; O, 16 g/moles; S, 32.1 g/moles;

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