When a solution of dithionite ions (S2O42–) is added to a solution of chromate ions (CrO42–), the products of the ensuing chemical reaction, which occurs under basic conditions, include soluble sulfite ions and solid chromic hydroxide. This reaction is used to remove Cr(VI) from wastewater generated by factories that make chrome-plated metals. (a) Write the net ionic equation for this reaction. Do not include phases. (b) How many grams of sodium dithionite would be needed to remove the Cr(VI) in 115 L of wastewater that contains 1.43×10-3 M chromate ions?
When a solution of dithionite ions (S2O42–) is added to a solution of chromate ions (CrO42–), the products of the ensuing chemical reaction, which occurs under basic conditions, include soluble sulfite ions and solid chromic hydroxide. This reaction is used to remove Cr(VI) from wastewater generated by factories that make chrome-plated metals. (a) Write the net ionic equation for this reaction. Do not include phases. (b) How many grams of sodium dithionite would be needed to remove the Cr(VI) in 115 L of wastewater that contains 1.43×10-3 M chromate ions?
General Chemistry - Standalone book (MindTap Course List)
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ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
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Chapter21: Chemistry Of The Main-group Elements
Section: Chapter Questions
Problem 21.200QP
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When a solution of dithionite ions (S2O42–) is added to a solution of chromate ions (CrO42–), the products of the ensuing
(a) Write the net ionic equation for this reaction. Do not include phases.
(b) How many grams of sodium dithionite would be needed to remove the Cr(VI) in 115 L of wastewater that contains 1.43×10-3 M chromate ions?
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