19 Questions
What is corrosion?
The loss of useful properties of materials due to chemical or electrochemical reaction with the environment
What is the science and art dedicated to preventing or controlling corrosion?
Corrosion engineering
Which of the following is NOT considered as corrosion?
Wear
Why is the conservation of metal resources important in the context of corrosion study?
To reduce material losses in metal structures
What percentage of the United States' Gross National Product is estimated to be the annual cost of metallic corrosion?
4.2%
In a multi-step chemical reaction, which step determines the rate law for the overall reaction?
The slowest step in the reaction
What can be concluded about a reaction if the observed rate law matches the rate-determining step in the proposed mechanism?
The proposed mechanism is consistent with the observed rate law
For the given reaction 2 NO (g) + O2 (g) 2 NO2 (g), why is a one-step reaction between two molecules of nitrogen oxide and a molecule of oxygen considered unlikely as the mechanism?
It violates the conservation of mass principle
In which type of reactions can the rate law be directly deduced from the stoichiometry of a balanced chemical equation?
Elementary reactions only
What term is used to describe the step in a multi-step reaction that limits the overall reaction rate?
Rate-determining step
Why can't the rate law be directly deduced from the stoichiometry of a balanced chemical equation for most chemical reactions?
Because it involves more than one step
In the context of inorganic reaction mechanisms, what does the slow step determine?
The overall reaction rate
What statement best describes the significance of lability and inertness in the context of kinetics?
Lability and inertness are kinetic terms.
What is the main flaw in an equation that contains a term not corresponding to any of the reactants or products?
It violates the principles of rate laws.
What is the purpose of the K1, K-1, and K2 values in the context of inorganic reaction mechanisms?
To determine the rate constants of the elementary steps
What does the statement 'we can only disprove a mechanism, but we can never prove a mechanism' imply about the study of reaction mechanisms?
It emphasizes the complexity of proving a mechanistic scheme.
What type of reactions does fast spectrophotometry techniques typically analyze?
"Rapid" reactions relaxation
According to the provided text, what is the role of solvent in determining substitution pathways for square planar reaction centers?
It influences the substitution pathways.
"Measurements of Rates of Reactions" techniques can be used for which type of species with respect to their half-life times according to the text?
Primarily for "inert" and "labile" species with varying half-life times.
Test your knowledge about the significance of corrosion on infrastructure, including its impact on bridges and engineering structures. Explore the causes and effects of corrosion in materials and its implications for infrastructure safety.
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