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Introduction to Lab #18…..

Without mysteries, life would be very dull indeed. Introduction to Lab #18…. The Ten Test Tube Mystery. Ten Numbered T-Tubes Each with a single substance Given a part of today and tomorrow to prepare No external reagents, testing materials. Smell and sight can be used.

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Introduction to Lab #18…..

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  1. Without mysteries, life would be very dull indeed. Introduction to Lab #18….. The Ten Test Tube Mystery

  2. Ten Numbered T-Tubes • Each with a single substance • Given a part of today and tomorrow to prepare • No external reagents, testing materials. • Smell and sight can be used

  3. All sets contain hydrochloric and sulfuric acid as well as ammonia and sodium hydroxide • All others are nitrates, chlorides or sulfates some held in an acid environment

  4. Preliminary Work • Use your text, Appendix II, or the on-line resources wikipedia or webelements. • NR, no reaction • P, precipitate (followed by D if it dissolves) • State colors if appropriate • H, heat evolved • G or S for gas or smoke formed

  5. 0.1 M Al(NO3)3 • 0.1 M BaCl2 • 0.1 M NiSO4 • 0.1 M BiCl3 (in 3 M HCl) • 6 M NaOH • 3 M H2SO4

  6. Al(NO3)3 BaCl2 NiSO4 NaOH H2SO4 BiCl3 ? Al(NO3)3 BaCl2 NiSO4 BiCl3 NaOH H2SO4

  7. Al(NO3)3 BaCl2 NiSO4 NaOH H2SO4 BiCl3 ? NR ? Al(NO3)3 BaCl2 NiSO4 BiCl3 NaOH H2SO4

  8. Al(NO3)3 BaCl2 NiSO4 NaOH H2SO4 BiCl3 ? ? NR NR Al(NO3)3 BaCl2 NiSO4 BiCl3 NaOH H2SO4

  9. Al(NO3)3 BaCl2 NiSO4 NaOH H2SO4 BiCl3 ? ? NR NR NR Al(NO3)3 BaCl2 NiSO4 BiCl3 NaOH H2SO4

  10. Al(NO3)3 BaCl2 NiSO4 NaOH H2SO4 BiCl3 NR NR NR P,D NR ? Al(NO3)3 BaCl2 NiSO4 BiCl3 NaOH H2SO4 ?

  11. Al(NO3)3 BaCl2 NiSO4 NaOH H2SO4 BiCl3 NR NR NR P,D NR Al(NO3)3 BaCl2 NiSO4 BiCl3 NaOH H2SO4 P ? NR ? ? (white)

  12. Al(NO3)3 BaCl2 NiSO4 NaOH H2SO4 BiCl3 NR NR NR P,D NR Al(NO3)3 BaCl2 NiSO4 BiCl3 NaOH H2SO4 sl P P P NR ? ? (white) (white) (white)

  13. Al(NO3)3 BaCl2 NiSO4 NaOH H2SO4 BiCl3 NR NR NR P,D NR Al(NO3)3 BaCl2 NiSO4 BiCl3 NaOH H2SO4 sl P P P NR (white) (white) (white) P NR NR Test Tube #4 (green) (green) P,H NR (white) H

  14. 4+1 no reaction 4+2 no reaction 4+3 green PPT 4+5 no reaction 4+6 white PPT Mixing Tests – First Series

  15. Al(NO3)3 BaCl2 NiSO4 NaOH H2SO4 BiCl3 NR NR NR P,D NR Al(NO3)3 BaCl2 NiSO4 BiCl3 NaOH H2SO4 sl P P P NR Test Tube #6 (white) (white) (white) NR P NR Test Tube #4 (green) (green) P,H NR (white) H Test Tube #3 4+3 green PPT 4+6 white PPT

  16. 3+1 sol’n becomes hot 3+2 white PPT, sol’n becomes hot 3+5 no rection Mixing Tests – Second Series

  17. Al(NO3)3 BaCl2 NiSO4 NaOH H2SO4 BiCl3 Test Tube #5 NR NR NR P,D NR Al(NO3)3 BaCl2 NiSO4 BiCl3 NaOH H2SO4 P P sl P NR Test Tube #6 (white) (white) (white) P NR NR Test Tube #4 (green) (green) P,H NR Test Tube #2 (white) H Test Tube #3 Test Tube #1 3+1 sol’n becomes hot 3+2 white PPT, sol’n becomes hot

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