Question 11 a student is given an unknown aqueous

Question 11
A student is given an unknown aqueous sample containing one of the three ions, Al , Ba , or Mg . There is limited
unknown so the student can only run a couple of tests. Select all tests, based on the tables above, that will not provide
useful information, even when performed correctly, to identify ions present in the unknown.
3+ 2+ 2+
NaOH
NH
3
Na CO
2 3
KI
Na SO
2 4
0 / 2 pts
Question 12 Incorrect Incorrect
The TA then informs the class that some unknowns may have only contained distilled water. Which single test should
the student perform to make sure they have unknown ions in their sample?

2 / 2 pts
Question 13
The TA then informs the students that there are two ions in their unknown. You have already tested your unknown with
Na SO and saw the solution formed a white solid. You only have enough of your sample for one more test. What is
the first ion in your unknown and what test should you conduct in order to determine the other unknown ion?
Quiz Score:
12
out of 15