A student studied the clock reaction described in this experiment using Reaction Mixture 3 : • 10.0 mL 0.010 M KI, • 10.0 mL 0.0010 M Na, S2 Os, 20.0 mL 0.040 M KBrO3, • 10.0 mL 0.10 M HCI, • 0.00 mL H20, according to the procedure given. It took about 45 seconds for the color to turn blue. 1. The number of moles of each reactant does not change when that reactant is mixed with the others, but its concentration does. For any reactant A, Moles of A = MA stock x Vatock = MA mirture x Vmixture The volume of the mixture was 50.0 mL. Revising the above equation gives Vstock (mL) MA mixture = MA stock X 50.0 mL Find the concentrations of each reactant in the reaction mixture, using the equation above: [I] = M [Bro3 ] = M [H+] = 2. What was the relative rate of the reaction? 1000 Relative rate = Time taken (s) Relative rate = 1/sec

A student studied the clock reaction described in this experiment using Reaction Mixture 3 : • 10.0 mL 0.010 M KI, • 10.0 mL 0.0010 M Na, S2 Os, 20.0 mL 0.040 M KBrO3, • 10.0 mL 0.10 M HCI, • 0.00 mL H20, according to the procedure given. It took about 45 seconds for the color to turn blue. 1. The number of moles of each reactant does not change when that reactant is mixed with the others, but its concentration does. For any reactant A, Moles of A = MA stock x Vatock = MA mirture x Vmixture The volume of the mixture was 50.0 mL. Revising the above equation gives Vstock (mL) MA mixture = MA stock X 50.0 mL Find the concentrations of each reactant in the reaction mixture, using the equation above: [I] = M [Bro3 ] = M [H+] = 2. What was the relative rate of the reaction? 1000 Relative rate = Time taken (s) Relative rate = 1/sec

Chemical Principles in the Laboratory

11th Edition

ISBN:9781305264434

Author:Emil Slowinski, Wayne C. Wolsey, Robert Rossi

Publisher:Emil Slowinski, Wayne C. Wolsey, Robert Rossi

Chapter21: Rates Of Chemical Reactions, Ii. A Clock Reaction

Section: Chapter Questions

Problem 1ASA

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