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In the presence of excess thiocyanate ion, SCN¯, the following reaction is first order in chromium(II) ion, Cr³+; the rate constant is 6.0 x 10-0 /s. Cr** (ag) + SCN¯ (aq) → Cr(SCN)²+ (ag) a. What is the half-life in hours? t1/2 hr b. How many hours would be required for the initial concentration of Cr³+ to decrease to 25.0% left? t25% left | hr c. How many hours would be required for the initial concentration of Cr*+ to decrease to 12.5% left? t12.5% left hr

In the presence of excess thiocyanate ion, SCN¯, the following reaction is first order in chromium(II) ion, Cr³+; the rate constant is 6.0 x 10-0 /s. Cr** (ag) + SCN¯ (aq) → Cr(SCN)²+ (ag) a. What is the half-life in hours? t1/2 hr b. How many hours would be required for the initial concentration of Cr³+ to decrease to 25.0% left? t25% left | hr c. How many hours would be required for the initial concentration of Cr*+ to decrease to 12.5% left? t12.5% left hr

General Chemistry - Standalone book (MindTap Course List)
General Chemistry - Standalone book (MindTap Course List)
11th Edition
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
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter13: Rates Of Reaction
Section: Chapter Questions
Problem 13.65QP: In the presence of excess thiocyanate ion, SCN, the following reaction is first order in...
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In the presence of excess thiocyanate ion, SCN, the following reaction is first order in chromium(III) ion, Cr**; the rate constant is 6.0 x 10–0/s. Cr*+ (ag) + SCN (ag) → Cr(SCN)2+ (ag) a. What is the half-life in hours? hr b. How many hours would be required for the initial concentration of Cr+ to decrease to 25.0% left? t25% left = hr c. How many hours would be required for the initial concentration of Cr+ to decrease to 12.5% left? t12.5% left =| hr d. How many hours would be required for the initial concentration of Cr³+ to decrease to 6.25% left? to 25% left* hr e. How many hours would be required for the initial concentration of Cr+ to do case to 3.125 eft? t3.125% left = hr
Transcribed Image Text:In the presence of excess thiocyanate ion, SCN, the following reaction is first order in chromium(III) ion, Cr**; the rate constant is 6.0 x 10–0/s. Cr*+ (ag) + SCN (ag) → Cr(SCN)2+ (ag) a. What is the half-life in hours? hr b. How many hours would be required for the initial concentration of Cr+ to decrease to 25.0% left? t25% left = hr c. How many hours would be required for the initial concentration of Cr+ to decrease to 12.5% left? t12.5% left =| hr d. How many hours would be required for the initial concentration of Cr³+ to decrease to 6.25% left? to 25% left* hr e. How many hours would be required for the initial concentration of Cr+ to do case to 3.125 eft? t3.125% left = hr
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