The work has not been graded but I like the output that was submitted to me. Is it possible for the same prof to do the next assignment I will be submitting? If possible, I will greatly appreciate it.
Presentation/PPT
26/08/2022
I am confused about some post lab questions i need to answer about a lab I did on Le Chatelier’s Principle.
Given:
Pb2+ + 2 I ‐ ⇌ PbI2
Pb2+ + 2 OH‐ ⇌ Pb(OH)2
Procedure:
a. Mix 5 drops Pb(NO3)2 and 5 drops KI in a test tube. Swirl/stir to mix thoroughly. Record observations. b. Add enough 0.1M NaOH to cause a change. Swirl/stir to mix thoroughly. Record observations. c. Add enough HNO3 to cause a significant change. Swirl/stir to mix thoroughly. Record observations.
observation info: for part A, when we combined Pb(NO3)2 with KI, a clear liquid and yellow precipitate formed. For part B, when we added NaOH until a change, the precipitate turned white. for part C, when we added HNO3 until a change, the precipitate turned yellow and the solution a clear yellow.
2. Describe the change observed when sodium hydroxide is added in step b (step b. Add enough 0.1M NaOH to cause a change. Swirl/stir to mix thoroughly) and explain why this change is consistent with Le Chatelier’s principle. {Note – to explain in terms of Le Chatelier’s principle means to explain the new change in conditions (in terms of the relative amounts of substance on both sides of the reaction equilibrium), what direction the equilibrium possibly shifted (toward left/reactants or right/products), and how this shift is done in terms of appearance/disappearance of substances. If more than one equilibrium state is affected explain all conditions and shifts.}
3. Describe the change observed when nitric acid is added in step c and explain why this change is consistent with Le Chatelier’s principle.
I don’t really understand how my observations will tell me if the reactions are consistent with Le Chatelier’s principle and the reaction shifts to achieve equilibrium after being disturbed and how to tell which way the reaction shifts… Thanks!
Show more
The work has not been graded but I like the output that was submitted to me. Is it possible for the same prof to do the next assignment I will be submitting? If possible, I will greatly appreciate it.
Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.
You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.
Read moreEach paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.
Read moreThanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.
Read moreYour email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.
Read moreBy sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.
Read more