2I– (aq) + H2O2 (aq) + 2H3O + (aq) → I2 (aq) + 4H2O (l) (slow) C6H8O6 (aq) + 2H2O (l) + I2 (aq) → C6H6O6 (aq) + 2H3O + (aq) + 2I– (aq) (very fast) I2 (aq) + I– (aq) ⇌ I – 3 (aq) I3- (aq) + starch → blue I3- · starch complex (aq) (fast) A different 0.100 L reaction mixture is prepared with initial concentrations of 1.0×10−2 M iodide I– , 2.0 × 10−3 M ascorbic acid C6H8O6 , and 0.135 M hydrogen peroxide H2O2 . If the first two reactions above procede at the same rate (they’re limited by the first one!), which of these reactants will be completely consumed first?
2I– (aq) + H2O2 (aq) + 2H3O + (aq) → I2 (aq) + 4H2O (l) (slow) C6H8O6 (aq) + 2H2O (l) + I2 (aq) → C6H6O6 (aq) + 2H3O + (aq) + 2I– (aq) (very fast) I2 (aq) + I– (aq) ⇌ I – 3 (aq) I3- (aq) + starch → blue I3- · starch complex (aq) (fast) A different 0.100 L reaction mixture is prepared with initial concentrations of 1.0×10−2 M iodide I– , 2.0 × 10−3 M ascorbic acid C6H8O6 , and 0.135 M hydrogen peroxide H2O2 . If the first two reactions above procede at the same rate (they’re limited by the first one!), which of these reactants will be completely consumed first?
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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2I– (aq) + H2O2 (aq) + 2H3O + (aq) → I2 (aq) + 4H2O (l) (slow)
C6H8O6 (aq) + 2H2O (l) + I2 (aq) → C6H6O6 (aq) + 2H3O + (aq) + 2I– (aq) (very fast)
I2 (aq) + I– (aq) ⇌ I – 3 (aq)
I3- (aq) + starch → blue I3- · starch complex (aq) (fast)
A different 0.100 L reaction mixture is prepared with initial concentrations of 1.0×10−2 M iodide I– , 2.0 × 10−3 M ascorbic acid C6H8O6 , and 0.135 M hydrogen peroxide H2O2 . If the first two reactions above procede at the same rate (they’re limited by the first one!), which of these reactants will be completely consumed first?
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