MindMap Gallery Redox reaction and electrode potential (1)
This is a mind map about redox reactions and electrode potential (1), including the Nernst equation of electrode potential, the application of electromotive force and electrode potential, the thermodynamics of primary batteries, etc.
Edited at 2023-11-16 16:21:12This is a flowchart illustrating the process of archiving monthly failure analysis reports and tracking the implementation of improvement measures. The diagram is structured into five main steps, each with specific tasks and sub-tasks.Monthly Report Collection & Organization: This step involves collecting failure analysis reports from various departments, reviewing them for completeness, and categorizing them by product, failure mode, and severity. Root Cause Analysis & Statistics: Here, the focus is on categorizing causes, analyzing trends, identifying root causes, and compiling statistics on high-frequency failure modes and key components. Improvement Measure Formulation & Assignment: This step includes formulating improvement measures, assigning responsibilities, and setting timelines for implementation.Measure Implementation Tracking & Verification: It involves tracking the progress of implementation, verifying effectiveness, and confirming issue closure.Knowledge Base Update & Monthly Report Output: The final step covers archiving reports, updating the knowledge base, and compiling monthly summaries.This template can be easily reused and adapted using tools like EdrawMind to suit different organizational needs.
This is a timeline infographic detailing the annual product certification acquisition countdown process, structured into four sequential phases. The first phase, Certification Planning & Initiation, encompasses goal setting, timeline planning, resource preparation, defining specific certification objectives such as CCC/CE/FCC, formulating an annual plan with key milestones, and allocating necessary budget, personnel, and sample resources. Following this, the Application & Testing Phase involves material submission, coordination with certification agencies, core testing procedures, preparation of technical documents, application forms, and samples, selection of the appropriate certification agency, and execution of critical safety, EMC, and RF tests. The subsequent Rectification & Acquisition Phase focuses on addressing and rectifying any identified issues, re-verification processes, acquisition of the certificate, analysis of test issues, implementation of necessary fixes, and modification of samples for supplemental testing. Finally, the Countdown Monitoring phase emphasizes tracking progress, managing risks, monitoring remaining days and key milestones, managing time, technical, and cost risks, and maintaining effective internal and external communication throughout the process. This comprehensive template can be readily reused and adapted using tools like EdrawMind to meet diverse organizational requirements.
This is a flowchart detailing the weekly update and review plan for technical documents. The process is divided into six main stages, each with specific tasks and responsibilities. It begins with Weekly Planning, where the document scope is defined, update objectives are set, and schedules are arranged. Next, Document Updates involve maintaining various documents such as hardware design documents, test specifications, and BOM tables, alongside version control and archiving. Internal Review Preparation follows, focusing on compiling review materials, identifying participants, and setting agendas. The Review Meeting stage includes document examination, problem discussion, decision recording, and responsibility allocation. After the meeting, Review Feedback Processing takes place, involving issue tracking, document modification, quality checks, and closure verification. Finally, Output Deliverables are prepared, including official release versions, release notifications, review reports, and plans for the next week. This structured approach ensures systematic and efficient management of technical documents, and the template can be easily adapted using tools like EdrawMind.
This is a flowchart illustrating the process of archiving monthly failure analysis reports and tracking the implementation of improvement measures. The diagram is structured into five main steps, each with specific tasks and sub-tasks.Monthly Report Collection & Organization: This step involves collecting failure analysis reports from various departments, reviewing them for completeness, and categorizing them by product, failure mode, and severity. Root Cause Analysis & Statistics: Here, the focus is on categorizing causes, analyzing trends, identifying root causes, and compiling statistics on high-frequency failure modes and key components. Improvement Measure Formulation & Assignment: This step includes formulating improvement measures, assigning responsibilities, and setting timelines for implementation.Measure Implementation Tracking & Verification: It involves tracking the progress of implementation, verifying effectiveness, and confirming issue closure.Knowledge Base Update & Monthly Report Output: The final step covers archiving reports, updating the knowledge base, and compiling monthly summaries.This template can be easily reused and adapted using tools like EdrawMind to suit different organizational needs.
This is a timeline infographic detailing the annual product certification acquisition countdown process, structured into four sequential phases. The first phase, Certification Planning & Initiation, encompasses goal setting, timeline planning, resource preparation, defining specific certification objectives such as CCC/CE/FCC, formulating an annual plan with key milestones, and allocating necessary budget, personnel, and sample resources. Following this, the Application & Testing Phase involves material submission, coordination with certification agencies, core testing procedures, preparation of technical documents, application forms, and samples, selection of the appropriate certification agency, and execution of critical safety, EMC, and RF tests. The subsequent Rectification & Acquisition Phase focuses on addressing and rectifying any identified issues, re-verification processes, acquisition of the certificate, analysis of test issues, implementation of necessary fixes, and modification of samples for supplemental testing. Finally, the Countdown Monitoring phase emphasizes tracking progress, managing risks, monitoring remaining days and key milestones, managing time, technical, and cost risks, and maintaining effective internal and external communication throughout the process. This comprehensive template can be readily reused and adapted using tools like EdrawMind to meet diverse organizational requirements.
This is a flowchart detailing the weekly update and review plan for technical documents. The process is divided into six main stages, each with specific tasks and responsibilities. It begins with Weekly Planning, where the document scope is defined, update objectives are set, and schedules are arranged. Next, Document Updates involve maintaining various documents such as hardware design documents, test specifications, and BOM tables, alongside version control and archiving. Internal Review Preparation follows, focusing on compiling review materials, identifying participants, and setting agendas. The Review Meeting stage includes document examination, problem discussion, decision recording, and responsibility allocation. After the meeting, Review Feedback Processing takes place, involving issue tracking, document modification, quality checks, and closure verification. Finally, Output Deliverables are prepared, including official release versions, release notifications, review reports, and plans for the next week. This structured approach ensures systematic and efficient management of technical documents, and the template can be easily adapted using tools like EdrawMind.
Redox reactions and electrode potential
Redox reactions
Oxidation value
It is not necessarily consistent with the valence (the ratio of the number of atoms combined).
e.g. The C oxidation numbers of CH4 and CHCl3 are -4 and 2 respectively, but their valencies are all 4.
The apparent charge of an atom of an element
redox half reaction
Half reactions consist of different oxidation numbers of atoms of the same element, where oxygen The one with a higher chemical number is in the oxidation state, and the one with a lower oxidation number is in the reduced state.
Oxidation state (Ox) ne -→Reduction state (Red)
Redox couple: oxidized state/reduced state Ox/Red
When the medium or other substances in the solution participate in the half-reaction, it should also be written
Balancing redox reaction equations (ion-electron method)
write ionic equation
Write a half-reaction based on the redox couple
Balance half-reactions (especially O atoms) according to mass conservation and charge conservation
Determine the two half-reaction coefficients and combine the half-reactions
step
Primary battery
Galvanic cell reaction: two half reactions
Re1 Ox2 == Ox1 Re2
Battery composition
(-) Zn(s)︱ZnSO4(c1) ||CuSO4 (c2) ︱Cu(s) ( )
Electrode type
Metal - metal ion electrode
Gas-Ion Electrode
Metal - Metal refractory salt electrode
Redox electrode or concentration electrode
Generation of electrode potential
A "double electric layer" is formed between the metal surface and the solution interface. That is, the electrode potential difference
Standard electrode potential φθ
When the electrode to be measured is in the standard state, the electrode potential is measured, but the absolute value of the electrode potential cannot be measured.
Eθ=φθ( ) - φθ(-)
ΔGθ = -nFEθ
lnKθ = nFEθ/(RT)
application
Standard electrodes and commonly used electrodes
Standard hydrogen electrode: the electrode potential is set to 0
Calomel electrode: Hg2Cl2(s) 2e -== 2Hg(l) 2Cl -(aq), φ(Hg2Cl2/Hg)=0.2412 (saturated)
Silver chloride electrode: AgCl(s) e -==Ag(s) Cl-(aq), φ(AgCl/Ag)=0.2223 (1mol/L)
Thermodynamics of galvanic cells
The relationship between △rGm and E
△rGm=-nFE
Relationship between Kθ and Eθ
lnKθ = nFEθ/(RT) lgKθ = nEθ/0.05916 (when T=298.15K)
Application of electromotive force and electrode potential
The redox properties of substances can be compared based on the relative magnitude of the electrode potential algebraic values. The strength of
Determine the direction of redox reactions
ΔG < 0, E > 0, spontaneous (output useful work)
ΔG = 0, E = 0, equilibrium
ΔG > 0, E < 0 cannot proceed spontaneously
Measures the extent of redox reactions
Find the solubility product of poorly soluble salts
Nernst equation for electrode potential
acidity
Precipitation formation (important and difficult points)
Complex formation
Weak electrolyte generation
writing rules
The left is the negative electrode, which performs oxidation; the right is the positive electrode, which performs reduction.
“|” indicates the phase interface and there is a potential difference.
"||" means salt bridge. The solution is close to the salt bridge, which reduces the liquid junction potential to negligible
The temperature must be indicated, otherwise it means 298.15 K. The state of matter must be indicated, the pressure must be indicated for gases, and the concentration must be indicated for solutions.
Gas electrodes and redox electrodes should be written with conductive inert electrodes, usually platinum electrodes, written on the outside, with solids and gases close to the electrode plates.
Oxidation reaction ‖ Reduction reaction Low valence state │ High valence state ‖ High valence state │ Low valence state