11.5-11.6

11.5-11.6 - Strong Acid Reminder H2O Write the spontaneous net equation for the rxn(if there is one when a copper coated zinc penny is placed in an

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1 Strong Acid Reminder H 1+ (aq) + Cl 1- (aq) HCl H 2 O Acidic solution Write the spontaneous net equation for the rxn (if there is one) when a copper coated zinc penny is placed in an aqueous solution of HCl. Cu (s) + Zn (s) + HCl (aq) Solubility rule: HCl (aq) is a strong acid Cu (s) + Zn (s) + H 1+ (aq) + Cl 1- (aq) Identify the gas being given off. Section 11.5 Cu (s) + Zn (s) + H 1+ (aq) + Cl 1- (aq) Zn 2+ (aq) + 2e 1- Zn (s) -0.76 V 2H 1+ (aq) + 2e 1- H 2 (g) +0.00 V + - Cu 2+ (aq) + 2e 1- Cu (s) +0.34 V Cl 2 (g) + 2e 1- 2Cl 1- (aq) +1.36 V Section 11.5 Step 1: Look up the reactions in Table 11.1. List them with most negative on top, and most positive on bottom. Cl 2 (g) 2Cl 1- (aq) Cu 2+ (aq) Cu (s) 2H + (aq) H 2 (g) (One e - /Cl 1- ) E + - Zn 2+ (aq) Zn (s) Cu (s) + Zn (s) + H 1+ (aq) + Cl 1- (aq) Section 11.5 2H 1+ (aq) + Zn (s) H 2 (g) + Zn 2+ (aq) Gas given off Common Mistakes in Identifying and Writing Net Redox Reactions fluorine = F 2 (g) fluoride = F 1- (aq) chlorine = Cl 2 (g) chloride = Cl 1- (aq) bromine = Br 2 (l) bromide = Br 1- (aq) iodine = I 2 (s) iodide = I 1- (aq) ox state = 0 ox state = -1 Lead shot = Pb (s) Metallic copper = Cu (s) Silver wire = Ag (s) Zinc coin = Zn (s) ox state = 0 Section 11.5 FeBr 2 (s) NOOOOO! Fe(s) + Br 2 (l) FeBr 2 (s) Fe 2+ (aq) + 2Br 1- (aq) YES! Section 11.5 Common Mistakes in Identifying and Writing Net Redox Reactions Silver wire is added to a solution of Nickel(II) chloride Ag or Ag

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This note was uploaded on 03/30/2010 for the course CH 101 taught by Professor Bigham during the Fall '08 term at N.C. State.

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11.5-11.6 - Strong Acid Reminder H2O Write the spontaneous net equation for the rxn(if there is one when a copper coated zinc penny is placed in an

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