[Discussion] [Test Your Knowledge] Chemical Production Knowledge (53) – True or False Questions
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This post was last edited by swwsdwf on 2010-1-14 21:20. True or False questions: (Answer format: True True True True False) 1. When electricity is passed, the mass of the substance deposited on the electrodes is proportional to the amount of electric charge that passes through the electrolyte； 2. If the unit of electric charge is amperes*minutes, then the mass of substance deposited per amperes*minute of electric charge is called the \"electrochemical equivalent\"” ； 3. Overpotential is the difference between the actual electrolytic potential of ions at the electrode and the theoretical discharge potential ； 4. In actual electrolysis, the theoretical decomposition voltage can be determined based on the standard equilibrium electrode potentials ； 5. With a constant electrolyte concentration and electrode material, maintaining a steady electrolysis temperature ensures that the electrolysis potential remains relatively stable. Reference answers: 1. Proportional to the amount of substance. 2. True. 3. The overpotential is the difference between the actual electrolytic potential of ions at the electrode and the theoretical discharge potential, plus the voltage drop due to ohmic resistance. 4. It also requires factors such as temperature, pH value, and electrolyte concentration to be calculated. 5. True. Note: 1) 2 points are awarded for each correct answer in this activity, with a total score of 10 points. To encourage members to answer questions carefully, those who score full marks and provide explanations for any mistakes made will be rewarded with 1 Charm point. Those who do not hide their answers or do not format them accordingly will, in principle, not be graded. 2) Answers using the same IP are valid only for the first post. Also, please be cautious when posting; edits are invalid (except for replies on the first floor). 3) To achieve the goal of reviewing old material to gain new insights, the answer key is released the following day. Additionally, if you have any objections to the answer key for a certain question, you can post a topic thread for in-depth discussion. 4) Replies to this activity are limited to floor 50 only; replies from floors above 50 will not be considered.
1. When electricity is applied, the mass of material deposited on the electrodes is proportional to the amount of electric charge that passes through the electrolyte； It should be the amount of substance in units of 2. If the unit of electric charge is amperes*minutes, then the mass of substance precipitated per amperes*minute of electric charge passed is called the \"electrochemical equivalent\"” ； 3. Overpotential is the difference between the actual electrolytic potential of ions at the electrode and the theoretical discharge potential ； 4. In actual electrolysis, the theoretical decomposition voltage can be determined based on the standard equilibrium electrode potentials ； 5. With a constant electrolyte concentration and electrode material, maintaining a steady electrolysis temperature ensures that the electrolysis potential remains relatively stable. Yes yes yes yes yes
Wrong, wrong, right, wrong – it’s all about electrochemistry; it’s difficult. . . .
Right, wrong, right, right, right. The phenomenon in which extremely slow response causes the electrode potential to deviate from the equilibrium potential is called electrochemical polarization. At this point, the difference between the electrode potential and the equilibrium potential is called the electrochemical overpotential.
1、Wrong 2、Right 3、Wrong 4、Wrong 5、Right
Why is it always electrochemistry! ! ! Right wrong right wrong right