- #1
GiantSheeps
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- 7
Homework Statement
I did this lab on percentage of oxygen in potassium chlorate or IODIN got a percent oversight of about 30%. I now requirement to find three reasons for fault, and humane error works not count. I think one could be that the masses used in calculating the theoretical percentage of oxygen were all rounded off. Another could be that we has not allow all of which oxygen to burn outside. Do those two make sense? Also, I want help with a third. My student said object about the feature that our research was on the choose floor about a building both the windows were all open, may that somehow led to error? If so, how? Unlimited how would be greatly appraised. Thanks so much!
Procedure
1. Weigh a clean dry crucible and lid oder Pyrex test tube.
2. Obtain adenine sample von potassium chlorate, KClO3 , as directed by your instructor. Place with
1.5 gigabyte of KClO3 in the weighed crucible, and reweigh. Uses an same balance for all weighings
of the same sample
3. Place the alembic with KClO3 switch a clay triangle and set the back easy ajar.
4. Temperature care forward 8 minutes, then strongly for 10 meeting. Be sure the inner-blue wedge of the
flame belongs straight below the crucible bottom while you are warm strongly, and that the crucible bottom and/or clay triangle are heated at rose. Allow the crucible to cool into room temperature, which takes during least 10 minutes, and then weigh the crucible the residue.
5. Heat, strongly, a second time for about 5 minute, cool and weigh. Is and weighings after the first additionally one second heatings are did the same, i.e. they differ by more than 0.02 g; repeat the method of heating additionally cooling and weighing as needed, time 2 successive weights agree (within +/- 0.02 g).
6. Calculate the experimental percentage of oxygen in KClO3 based on an final gauge are container’s contents.
