2. The molecule superoxide dismutates in aqueous solution. Three different reactions occur, depending on the protonation state of the superoxide. 0,-+ 0;+ 2H → H,O; + O, k = 0.3 M-'s-1 Pseudo-second order rate constant, fourth order reaction HO, + 0,- + H → H,O, + O, k = 9.7 10° M-'s- Pseudo-second order rate constant, third order reaction HO, + HO; > H,O; + O, k = 8.3 10$ M-'s Second order rate constant, second order reaction At the pH value of most body tissues (7.2), the ratio of [0;-]/[ HO;'] is about 500/1. pH 7.2 means that [H] = 6.31 10-8 M
2. The molecule superoxide dismutates in aqueous solution. Three different reactions occur, depending on the protonation state of the superoxide. 0,-+ 0;+ 2H → H,O; + O, k = 0.3 M-'s-1 Pseudo-second order rate constant, fourth order reaction HO, + 0,- + H → H,O, + O, k = 9.7 10° M-'s- Pseudo-second order rate constant, third order reaction HO, + HO; > H,O; + O, k = 8.3 10$ M-'s Second order rate constant, second order reaction At the pH value of most body tissues (7.2), the ratio of [0;-]/[ HO;'] is about 500/1. pH 7.2 means that [H] = 6.31 10-8 M
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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![2. The molecule superoxide dismutates in aqueous solution. Three different reactions occur, depending
on the protonation state of the superoxide.
0,- + 0,- + 2H → H,O; + O,
k = 0.3 M-'s-1 Pseudo-second order rate constant, fourth order
reaction
HO, + 0,- + H → H,O, + O,
k = 9.7•10° M-'s-1 Pseudo-second order rate constant, third
order reaction
HO; + HO; → H,O, + 0,
k = 8.3•10s M-'s- Second order rate constant, second order reaction
At the pH value of most body tissues (7.2), the ratio of [O,-]/[ HO;'] is about 500/1.
pH 7.2 means that [H] = 6.31 10-8 M
If the total superoxide concentration in a cell were 0.1 nM, what is the rate of superoxide dismutation?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2135b9a1-7b1e-4acf-b911-40f44f1d2cc3%2Fbd079a42-e16b-4a2c-944a-180b018d941d%2Fl42mvkb_processed.jpeg&w=3840&q=75)
Transcribed Image Text:2. The molecule superoxide dismutates in aqueous solution. Three different reactions occur, depending
on the protonation state of the superoxide.
0,- + 0,- + 2H → H,O; + O,
k = 0.3 M-'s-1 Pseudo-second order rate constant, fourth order
reaction
HO, + 0,- + H → H,O, + O,
k = 9.7•10° M-'s-1 Pseudo-second order rate constant, third
order reaction
HO; + HO; → H,O, + 0,
k = 8.3•10s M-'s- Second order rate constant, second order reaction
At the pH value of most body tissues (7.2), the ratio of [O,-]/[ HO;'] is about 500/1.
pH 7.2 means that [H] = 6.31 10-8 M
If the total superoxide concentration in a cell were 0.1 nM, what is the rate of superoxide dismutation?
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