Chemistry, 21.02.2020 03:50 familyk0jj3
An alloy sample weighing 5.00 g contains Cr. The Cr is chemically converted to a K2Cr2O7 solution. The Cr2O7-2 ion in the solution is completely and exactly converted to Cr 3 by reacting it with 4.73 g of I2. What is the % Cr in the alloy?
Need to balance: Cr207^2- + I2 ---> Cr^3+ + IO3^-
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