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Prelab 389R - b Neither element is present in the ionic...

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KEY to PRELAB 389: Single Replacement Reactions And Relative Reactivity 1. a. 6M HCl is corrosive and toxic. It can cause chemical burns on your skin. Its vapors are also harmful, so working in a fume hood is required. If any acid is spilled, immediately start washing your hands with lots of water. Inform your TA as soon as possible. b. The surfaces of metals are vulnerable to reaction with the oxygen and water in the air, and an oxide layer can be formed which prevents the reagent from reacting with the metal in its elemental state. Sandpaper is used to remove the oxide coating before the metal strip is reacted with the reagent of choice. 2. a. Neither element is present in the elemental form, so it is not possible for an oxidation reaction (loss of electrons) to take place. No reaction would occur.
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Unformatted text preview: b. Neither element is present in the ionic form, so it is not possible for a reduction reaction (gain of electrons) to take place. No reaction would occur. c. Yes. Zinc is more active than tin, it will transfer electrons to the Sn 2+ ions. A reaction would take place. Zn(s) + Sn 2+ (aq) → Zn 2+ (aq) + Sn (s) d. No. Zinc is more active than tin; it would transfer electrons to the Sn 2+ ions. Tin cannot transfer electrons to Zn 2+ ions. There would be no reaction. 3. 2 HCl (aq) + Zn (s) → H 2 (g) + ZnCl 2 (aq) 2 HCl (aq) + Pb (s) → H 2 (g) + PbCl 2 (aq) 2 HCl (aq) + Cu (s) → no reaction b. PbSO 4 (aq) + Zn (s) → Pb (s) + ZnSO 4 (aq) PbSO 4 (aq) + Cu (s) → no reaction c. Zn > Pb > H > Cu...
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