![]() What is the balanced equation for the cell reaction? Fe(s) + Sn2+(aq) → Fe2+(aq) + Sn(s) How long must a constant current of 50.0 A be passed through an electrolytic cell containing aqueous Cu2+ ions to produce 3.00 moles of copper metal? 3.22 hours How many grams of nickel metal are plated out when a constant current of 15.0 A is passed through aqueous NiCl2 for 80.0 minutes? 21.9 g How many grams of chromium metal are plated out when a constant current of 8.00 A is passed through an aqueous solution containing Cr3+ ions for 40.0 minutes? 3.45 g The cell reaction for a lead storage battery is: Fe is the anode and Sn is the cathode NO3- ions flow into half-cell compartment (A) and Na+ ions flow into half-cell compartment (B). 8.12 What is the percent dissociation of ascorbic acid if the solution has a pH = 5.50 and a pKa = 4.10? 96% What is the percent dissociation of glycine if the solution has a pH = 8.60 and a pKa = 9.60? 9% What is the resulting pH when 0.005 moles of KOH is added to 0.100 L of a buffer solution that is 0.100 M in H2PO4- and 0.100 M HPO42- and the Ka2 = 6.2 × 10-8? 7.69 Identify the anode and cathode, and indicate the direction of Na+ ion and NO3- ion flow from the salt bridge. 12.15 What is the approximate pH at the equivalence point of a weak acid-strong base titration if 25 mL of aqueous formic acid requires 29.80 mL of 0.0567 M NaOH?Ka = 1.8 × 10-4 for formic acid. 4.44 What is the pH of a solution made by mixing 30.00 mL of 0.10 M acetic acid with 40.00 mL of 0.10 M KOH? Assume that the volumes of the solutions are additive. ![]() What is the concentration of hypochlorite ion if 20.00 mL of bleach requires 28.30 mL of 0.500 M HCl to reach the equivalence point? 0.708 M What is the pH of the resulting solution if 30.00 mL of 0.10 M acetic acid is added to 10.00 mL of 0.10 M NaOH? Assume that the volumes of the solutions are additive.Ka = 1.8 × 10-5 for CH3CO2H. Sodium hypochlorite, NaOCl, is the active ingredient in household bleach.
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