Same Electrodes And Salt Solutions example essay topic
476 words
Experiment Aim: To identify the conditions under which a galvanic cell is produced. Equipment: - beakers - copper electrode - filter paper - zinc electrode - electrical wires - copper sulfate - voltmeter - zinc sulfate - sodium nitrate Risk assessment: - Sodium nitrate is poisonous, so gloves must be worn when soaking the filter paper into it. Method: 1. Set up a simple galvanic cell using the equipment listed above and observe the voltage on the voltmeter.
2. Remove the salt bridge and note what happens to the salt bridge. 3. Replace the salt bridge and remove the copper electrode from the solution and observe the voltage. 4.
Use two identical beakers (that is, have one copper electrode in copper sulfate solution and another copper electrode in copper sulfate solution). Observe the voltage. 5. Record your results.
Results: Conditions of galvanic cell Voltage (V) - Zn electrode in ZnSO 4 solution- Cu electrode in CuSO 4 solution- NaNO 3 salt bridge 0.55 - Zn electrode in ZnSO+4+ solution- Cu electrode in CuSO 4 solution 0 - Zn electrode in ZnSO 4 solution- NaNO 3 salt bridge 0 Identical beakers 0 Conclusion: The oxidation reaction at the anode is: The reduction reaction at the cathode is: Overall oxidation-reduction reaction (redox reaction): The cell diagram for the galvanic cell is: Zn (s) | Zn 2+ || Cu 2+ | Cu (s) When the salt bride or electrode is removed, or when having the same electrodes and salt solutions, the voltage remains to be 0. From the experiment, the conditions for which a galvanic cell is produced is when it has: - two but different electrodes - different electrolytes - a salt bridge which gave a voltage of 0.55. Evaluation: Without one electrode, there is no flow of electrons and the electrical circuit is incomplete. Both electrodes must be there to maintain electron flow, but electrodes must be different because it will not work if they were the same. One electrode must be more reactive than the other.
Without the salt bridge, there is no flow of ions, and there will be an imbalance of charges in the beakers, which is not possible. A salt bridge is needed to maintain neutrality. Sources of error include: - the electrodes could be rusted - contamination of substances - inaccurate readings on the voltmeter - having the electrodes on the wrong side, for e.g. having the copper electrode as the anode and having the zinc electrode as the cathode. The experiment can be improved by: - using sand paper to remove rust on the electrodes - clean all equipment before using The reliability can be improved by: - comparing results with the rest of the class - repeating the experiment.
Things every student should keep in mind
- Free example essays found anywhere online are available to anyone, which makes them used, re-used, paraphrased, and abused millions of times.
- Watch out, some are poorly written!
- We strongly discourage you to submit free essays or any of their parts for credit at your school -- they are easily detected by PLAGIARISM CHECKERS.
- Get a brand-new, 100% original paper that will be written especially for you following YOUR EXACT instructions.
100% money back, no questions asked if you paper is plagiarized (this won't happen anyway).
We use a simple but effective principle: one satisfied customer will come back for more, but one who was cheated and misled will tell 10 others too.
Our clients are treated with the highest level of respect that a legitimate student deserves. You, as a customer, will feel this attitude starting from your first contact with our essay service and all the way through.
A significant percentage of cheap essay writing services have also been the source of complaints from students for selling cut and pasted work off the net -- this is a world away from the personalized essay service that EssayPride offers. All our guarantees are always kept -- we are nothing without quality, affordable prices, and the high degree of customer satisfaction!
What our customers say
Piotr S.
Toronto, Canada
I am an ESL student and I am only learning how to write good papers in English. Thanks to EssayPride I am mastering this skill much faster. They help me because they always respond any questions and explain me things I do not understand. They also strictly follow the deadlines and I am never late with my assignments. Thank you very much, guys, your hard work is appreciated. I will surely be ordering more.
Lindsay M.
Winston Salem, NC
Oh my Gosh! My life has become sooo much easier after I've come across this website. I am a working student, so sometimes I am too overwhelmed with so many things and I really need a hand with my papers. I am glad I have found a company I can trust. I have confidence in these guys, because they proved to be good quite a few times.
Kirk N.
Austin, TX
I never leave reviews for products or services because I am quite particular and picky. Surprisingly enough, EssayPride has managed to satisfy all of my requirements, even though I asked for several alterations to the paper they've sent initially. My assignments are quite complicated and it is essential to possess a certain level of knowledge in order to write a decent paper. These guys have managed, so I give them four stars.
Emma Ch.
Birmingham, UK
Customer service is very responsive to your queries, they answer any question within an hour. Even if you have a problem with an order, you can contact them and they will fix it promptly. The quality of writing is very good, writer knows what he is talking about. I had a very positive experience using this website, I will be a returning customer.
Travis J.
Perth, Australia
I used this website more than once and every time my experience turned out to be extremely positive. I think their price-quality ratio is very good, because I couldn't find anyone writing better than these guys, who would work for this money. Thank you!
Myung O.
Seoul, South Korea
I am a Korean student studying in the US. I would like to thank essaypride staff, especially writer Jeff P., for helping me out so much. My grades are good with all your help and I keep calm about the results of my year.
Boyi Zh.
St. Louis, MO
As probably any student, I was quite hesitant about asking somebody else to do my assignments at first. However, after EssayPride has sent me my first paper and I've read it, I understood that I could actually learn a lot from them. The research they've done was impressive and I understood the topic even better than after going to class and reading my textbook. I am not using this website to "cheat", I am using it as a tutoring service, they help me to understand the material better.
