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- I would really appreciate some help in confirming a value computed in a prelab problem to be used in a lab for analytical chemistry! We're working on redox reactions and are looking at the reaction: Fe2+ + K2Cr2O7 + H+ = Fe3+ + K+ + Cr3+ + H2O The final questions asks, "calculate the amount of unknown sample needed to achieve about a 25.00 mL titration volume of 0.01600 M K2Cr2O7 if the %Fe of the unknown is approximately 8%. Make sure to use the coefficients from the balanced reaction" I have found the balanced equation; however, I was hoping to be able to confirm my values! Thank you in advance!How do you differentiate the method of standardizing the NaOH solution from that of HCl solution?mix 500 ml of 0.1 M HCl solution with 300 ml of 2 M Ba (OH) 2 solution a) indicate the environment of the solution after mixing b) What color will the detectors, phenophthalein and litmus get?
- You are planning to determine the concentration of acid in vinegar by titration with a suitable base. The container of vinegar states that the acetic acid concentration in the vinegar is 10%.Suggest a suitable titration to carry out this determination (note all reagents) and estimate the amount of 0.01 mol/l alkali solution that you will require for your class group (assuming 3 titrations by 10 students). Indicate the alkali solution that you will use.The following data were collected from a Ksp experiment on an alkaline earth hydroxide. Calculate the KSp of the alkaline earth hydroxide. Volume of saturated solution titrated 15.7 ml Molarity of HCl Volume HCl required for endpoint 0.129 M 10.48 ml2CrO4^2- + 2H^+ <-> Cr2O7^2- + H2O Color of Cr2O7^2- before anything was added is orange Color of CrO4^2- before anything was added is yellow 1) Explain what happened when acid was added to each test tube 2) Explained what happened when base was added to each test tube
- Given a solution containing K+, Mg2+, Ca2+, and Ba2+, draw a schematic diagram of a procedure that will separate these three ions.1. Do you always have to use a primary standard in the standardization of titrant? Why or why not?One mL of an unknown solution is placed in a test tube and a few drops of NaOH are added and shaken well. 1 mL of aqueous NH3 is then added to the solution and shaken again. A deep blue solution is observed. What is the interpretation for this result? Select one: A. There is Iron(III) (Fe3+) present in the solution. B. There is Zinc (Zn2+) present in the solution. C. There is Copper(II) (Cu2+) present in the solution.
- phenolphthalein turns pink in solutions that are roughly 1.0 x 10-5 m in hydroxide ions bartleyhe only source of hydroxide ions is your ca(oh)2. let’s assume that the amount of water left behind in the beaker to test for complete transfer is about three drops, or 0.15 ml. What % of the solution/solid was transferred over to the container?In a titration of 50.00 mL of 0.1000 M ethylamine with 0.1000 M HClO4, the titration error must be no more than 0.05 mL. What indicator can be chosen to realize this goal?Can you suggest another method to calculate the concentration of [H*]?