e cegg. The Student Hub | Te) usu Home-myLSU >+2017 Fall CHEM 12 12 for Kamx Tu

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e cegg. The Student Hub | Te) usu Home-myLSU >+2017 Fall CHEM 12 12 for Kamx Tu Secure https://courses.hayden-mcneil.com/mod/quiz/attempt.php?attempt 1275047&page-2;&scrollp; Home My Courses Need Help? Home > My courses Chemistry LSUCHEM1212F17 Experiment 15: Determination of Specific Heat and Various Heats of Reactions Quiz 15 Question 3 Select the steps that will compose a rationale for the cation 2n being absent in an unknown. Not complete Poies out of ao Select one nag Ared-pink solid,did not form after the addition of H,DMG in step 3-F O The lack of a green decanate after the addition of excess NaOH in step 3-A. O A blood red solution did not form when KSCN was added in step 3-D. o The lack of a yellow solution after the addition of H2o2 in step 38. O The lack of a purple-grape supernate over excess NaBio, in 3.G o After the Baci, was added in step 3-H, a colorless solution with no sold was present The lack of a grey-white sold forming in step 3 Check Questien 4 Not complete Select the stepls) that will compose a rationale for the cation Ni being present in an unknown. Select one or more: Points out of 30 A precipitate formed when 6 M NaOH was added to the unknown solution in step 3A O The precipitate from step 3-A dissolved in 6 M HNO O A strawberry red precipitate formed in step 3-F G A purple-grape supernate over excess NaBiO, formed in 3-G The solution remained the same after the addition of KSCN. O A grey-white solid formed in step 3) QUIZ TIMER Time left 0:16:31 0 F2 F3 FS

Explanation / Answer

Zn2+ is absent can be stated by the lack of yellow solution after the addition of H2O2. presence of Ni2+ can be confirmed by the stawberry red precipitate formed in step 3-F

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