i need to answer 6 and 9 but i do not know where to start. thank you for the help!
Results:
ferrous ammonium sulfate weight:
#1 1.5096g
#2 1.5049g
#3 1.5041g
unknown's weight:
#1 1.5047g
#2 1.5019g
#3 1.5005g
Blank solution end point:
0.10ml
Ferrous ammonium sulfate end point:
#1 39.71ml
#2 39.21ml
#3 39.38ml
Unknown end point:
#1 32.01ml
#2 31.89ml
#3 32.83ml
potassium anganate solutions to avoid large local excesses of permanganate ion. own solid, Mno, be produced by reaction of permanganate with M te e necessary to stop and wait until all of it has reacted with the o meniscus in the buret very difficult. Typically, you should read the titrant lonof ue to this same chemistry, it is important to titrate samples slowly with ring titr analyte before Finally, the intense color of potassium permanganate makes vistuyte beton top of the permanganate solution when the meniscus cannot be read a olumes makes visualization proceeding. Finall th using the top of the permanganate solut Procedure: 1. Accurately weigh three separate 1.5 g samples of ferrous ammonium sulfate place them in large beakers or Erlenmeyer flasks. 2. Add 10 mL of 6 M HCI and dilute the sample to 100 mL with water. Add 25 ml of 3. Titrate while stiring until the first appearance of a persistent pink end point color. t reagent. (note: do not add the titrant rapidly at any time). 4. Prepare a blank sample from 10 mL of 6 M HCl diluted to 100 mL with water. 5. Titrate the blank sample to the same pink end point as in step 4. It will only take a drop or two. The volume required to titrate the blank is the equivalent to the excess permanganate needed to see the end point. Subtract this volume from the total titrant volumes for your ferrous ammonium sulfate samples. 6. Calculate the concentration of the potassium permanganate titrant. 7. Accurately weigh three separate approximately 1.5 g samples of your unknown iron 8. Repeat steps 2 and 3 for the unknown samples 9. Report the percentage of Fe in the unknown sample. Remember to subtract the blank 10.Dispose of all solutions in the waste containers provided. sample and place them in large beakers or Erlenmeyer flasks. volume from the total titrant volume for the unknown samples.
