25. Dichromate ion is reduced by chloride ion according to the equation below. If [Cl] is decreasing at a rate of 0.37 m

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25 Dichromate Ion Is Reduced By Chloride Ion According To The Equation Below If Cl Is Decreasing At A Rate Of 0 37 M 1 (95.25 KiB) Viewed 59 times

25. Dichromate ion is reduced by chloride ion according to the equation below. If [Cl] is decreasing at a rate of 0.37 mol L-' min-1, how is the concentration of Cr3+(aq) changing? 14 H+(aq) + Cr2O72-(aq) + 6 Cl(aq) → 2 Cr3+(aq) + 3 Cl2(aq) + 7 H2O(1) (A) Increasing by 0.12 mol L-min-1 (B) Increasing by 1.11 mol L-4 min-1 (C) Decreasing by 0.12 mol L-? min-1 (D) Decreasing by 1.11 mol L- min-1 26. The isotope cobalt-57 has a half-life of 272 d. How long will it take a sample of $7Co to decay to 38% of its original activity? (A) 103 d (B) 337 d (C) 188 d (D) 380 d