Use the following half-cells with their reduction potentials to answer the electrochemistry questions below: Half-Reacti

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Use The Following Half Cells With Their Reduction Potentials To Answer The Electrochemistry Questions Below Half Reacti 1 (149.53 KiB) Viewed 75 times

Use the following half-cells with their reduction potentials to answer the electrochemistry questions below: Half-Reaction Al³+ (aq) + 3 e Al(s) HO₂ (aq) + H₂O(l) + 2 e 3 OH¯(aq) Ag+ (aq) + e Ag(s) Co2+(aq)+2 e = Co(s) Zn²+ (aq) + 2 e¯ ⇒ Zn(s) Eºred (V) +1.66 +0.88 +0.80 +0.28 -0.76 Question 1 Consider lead(II) azide, Pb(N3)2, with a Ksp of 2.5×10-⁹. a) (1) What is the [Pb²+] and [N3¹] in a saturated solution of Pb(N3)2? b) (1) How many grams of Pb(N3)2 would dissolve in 2.5 L water to create a saturated solution? c)(3) What do you expect the pH to be of a saturated Pb(N3)2 solution? The Ka of HN3 is 1.9x10-5. d) (2) Is it possible for lead(II) hydroxide to precipitate in a saturated Pb(N3)2 solution? Explain! The Ksp of Pb(OH)2 is 1.2×10-12. e) (1) What is the minimum pH required to precipitate Pb(OH)2, in a saturated Pb(N3)2 solution? f) (2) Explain how adjusting the pH could change the solubility of Pb(N3)2.