I am doing a lab assigment and I cant figure this one out: Quite often students
ID: 825564 • Letter: I
Question
I am doing a lab assigment and I cant figure this one out:
Quite often students state they have bismuth in their unknown when they actually have iron(III) even though they had a dark-colored precipitate in their test tube after adding nitric acid and potassium iodide to the supernatant in tt2. This is called a false positive.
These are my options:
A) I have to make sure all of the barium ions have been separated out of the solution prior to this step.
B) I have to make sure all of the aluminum ions have been separated out of the solution prior to this step.
C) I have to make sure all of the lead(II) ions have been separated out of the solution prior to this step.
D) I have to make sure all of the iron(III) ions have been separated out of the solution prior to this step
A) I have to make sure all of the barium ions have been separated out of the solution prior to this step.
B) I have to make sure all of the aluminum ions have been separated out of the solution prior to this step.
C) I have to make sure all of the lead(II) ions have been separated out of the solution prior to this step.
D) I have to make sure all of the iron(III) ions have been separated out of the solution prior to this step
Explanation / Answer
I have to make sure all of the iron(III) ions have been separated out of the solution prior to this step
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