19.3 Galvanic Cells | General Chemistry
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- Опубликовано: 7 авг 2024
- Chad provides a thorough lesson about galvanic cells (aka voltaic cells). The lesson begins with a comparison and contrast of galvanic cells vs electrolytic cells. Galvanic cells involve a spontaneous reaction that produces energy (electricity), while electrolytic cells involve a nonspontaneous reaction that consumes energy. In the galvanic cell electrons travel through the wire from anode (which is negative) to cathode (which is positive). In the electrolytic cell electrons still travel from anode to cathode but the signs are the opposite (anode is positive and cathode negative).
In the galvanic cell the two half reactions take place in separate half-cells the solutions of which are connected by a salt bridge. Anions travel through the salt bridge to the anode, and cations travel through the salt bridge to the cathode in order to maintain electrical neutrality in the solutions of both half-cells. Finally, it is common for the anode to lose mass and the cathode to gain mass in galvanic cells over time, though a common exception is when inert electrodes are used.
I've embedded this playlist as a course on my website with all the lessons organized by chapter in a collapsible menu and much of the content from the study guide included on the page. Check this lesson out at www.chadsprep.com/chads-gener...
If you want all my study guides, quizzes, final exam reviews, and practice exams, check out my General Chemistry Master Course (free trial available) at www.chadsprep.com/genchem-you...
00:00 Lesson Introduction
00:25 Galvanic Cell vs Electrolytic Cell
04:29 Anode and Cathode in a Galvanic Cell
14:04 Salt Bridge in a Galvanic Cell
22:04 Inert Electrode
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I dont even know what to say at this point. Words can't describe the love I have for your lectures
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This guy is literally the greatest of all time! Appreciate the vids, Chad! Keep ‘‘em coming, you’re the only person saving my grade right now 😅😂
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Plus he wears the best T-shirts!
I wish you were my chemistry professor.
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please never stop doing these! I'm so glad I found you videos my first year of chem. I would be lost without them!!
Glad you found us, littlesqueo53 - I plan to keep doing this as long as I can!
I just wanted to say Thank you!!!! Watching your videos was the MAIN thing I studied with and I finally passed my Chem class! I hope everyone knows about this channel whoever is studying chem
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Not only are your videos extremely helpful, but they keep me fascinated and interested to learn, I plan to watch your entire organic chemistry playlist this summer in preparation for Orgo 1 in the fall.
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You're my go to for chemistry! I only wish I had found you earlier in the semester.
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thank you soo much for making chemistry way more approachable
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Love how clear and easily digestible these all are!!
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Thank you, Chad. These videos are amazing
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Thank you so much for this amazing video series. You are an angel
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I AM FROM SOMALIA I UNDERSTOOD VERY WELL TEACHER❤❤❤
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Thanks,it's more understandable to me.I think I want to learn more. ❤
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Only the final to go, and Chads put the team on his back so far for this grade. We're almost to the finish line.
I just want to say that I love reading all your comments 😊
Been seeing them all semester!
the best gen chem channel!
Excellent!!!
what flows through the salt bridge? is it electrons or anions and cations ?
you are amazing, I can understood now ,thank you very very very very much❤❤❤🔥
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Question. What exactly is a corresponding salt, and how is SO4-2 related to zinc and copper
Perfect explanation ❤❤❤❤❤
Thank you
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Chad, I absolutely hate gen chem but u make it bearable. Thanks!
Glad to hear I'm taking the sting out of Gen Chem!
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Can i ask you? I've learned that due to the difference in chemical potential between the metal and the solution, Zn ions and Cu ions move from the metal to the solution, leaving electrons in the metal, resulting in a potential difference and electron flow. Now, I want to clarify the relationship between the ions migrating into the solution and the neutrality of the solution's charge.
Beautiful sir!
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Thankful😌🙏 to you
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Thank you Chad
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Just curious though but do most people with chem majors know how to cook blue stuff?
Hmmmmm....as in Walter White product? I couldn't say.
Thanks sir
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You didn’t explain what happens to make SHE works without conducting ions to build the bridge.
I DON’T KNOW WHY that at nearly 18k views in mid 2024 there aren’t AT LEAST twice as many likes!
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You lost me when explaining potential energy, I stopped at "if you've taken any physics"
I'm usually very good with concepts, can't wrap my head around that explanation
You can think of potential energy as a type of energy 'held' within the molecule as a result of its particular state. So for example if you are standing on the top of a cliff a certain number of meters above the Earth's surface you have gravitational potential energy - that is the potential to fall at velocity to the surface of the Earth if you were suddenly to not be supported, in the same way, electric potential is the potential for a charge to move due to it's position in an electric field (i.e. current moving due to electric potential created by the battery)