Under Certain Conditions the Reaction H₂O₂ + 3I^- + 2H⁺ $\to$

question 88

Multiple Choice

Under certain conditions the reaction H₂O₂ + 3I^- + 2H⁺ $\to$ I₃^- + 2H₂O occurs by the following series of steps:
k₁
Step 1.
H₂O₂ + H⁺ H₃O₂⁺
k_-1 Step 2.
H₃O₂⁺ + I^- $\to$ H₂O + HOI
(slow,rate constant k₂)
Step 3.
HOI + I^- $\to$ OH^- + I₂
(fast,rate constant k₃)
Step 4.
OH^- + H⁺ $\to$ H₂O
(fast,rate constant k₄)
Step 5.
I₂ + I^- $\to$ I₃^-
(fast,rate constant k₅)
-Which of the steps would be called the rate-determining step?

• A)1
• B)2
• C)3
• D)4

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Definitions:

Center-To-Center Spacing

The distance measured from the center of one feature (such as a hole or pin) to the center of another, critical for part alignment and assembly.

Intermittent Fillet Weld

A type of weld where continuous fillet welds are interrupted at regular intervals, used to join structural components while saving on material and reducing weight.

Supplementary Symbol

A symbol added to the basic nomenclature or notation in technical drawings, providing additional information about the feature or dimension it accompanies.

Basic Weld

A fundamental welding process where two metal pieces are joined together by melting their adjoining surfaces with or without using a filler material.