13. (7 pts) A 50.0 mL sample of 0.180 M Fe(NO3)2 is added to 50.0 mL of 2.0 M NaCN. What is theiron(II) ion concentration in this system at equilibrium?. (6 pts) The measured pH of a saturated Ca(OH)2 solution is 12.35. Calculate the experimental valuefor the Ksp of calcium hydroxide.15.(12 pts) a) How many grams of solid ammonium chloride must be added to 250. mL of 0.500 Maqueous ammonia to give a buffer with a pH of 9.40? (assume no change in volume)b) If 2.00 mL of 3.00M nitric acid is added to 50.0 mL of the buffer prepared in part a), what will be thepH of the resulting solution?nigho diff 10 0 800.0 x16. (12 pts) 20.0 mL of 0.120 M H2A, a weak acid, is titrated with 0.180 M NaOH.a) The pH after adding 10.5 mL of base is 4.88. Calculate the experimental value of Ka, for H2A.b) What is the pH at the second equivalence point? Kaz for H2A is 5.9 x 10-9.17. (8 pts) A solution contains 0.25 M NaF and 0.14 M K2SO4. Ba(NO3)2 is added slowly to the solutionto gradually increase the concentration of barium ions.a) You want to precipitate the maximum amount of sulfate (as BaSO4), but not allow any fluoride toprecipitate. What is the ideal [Ba”] in the solution in order to accomplish this?solution?b) At the [Ba”] you calculated for part a, what percentage of the original sulfate ion will remain in the18. Sketch the titration curve for the titration of 40.0 mL of 0.120 M H2CO3 with 0.180 M KOH. Be sureto clearly label any endpoints and be sure to show the volume of titrant is at these endpoints. Also,indicate what the pH will be at any half-way point(s).
Show more
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