Chem ps electrolysis

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Chem ps electrolysis

  1. 1. I CHEMISTRY 3 ELECTROCr{EMISIRY - Quantitative Aspects of Electrohsis Problem Set: of deposited from a solulion l. Horv many grams of the corresponding metal-s l"*Jg.b. eachofthefollorvingionsblthepassageof l.0x l03coulombsofelectricchargein an electroll4ic cell? (c) Fe*2 (d) Al.3 (a)cui2 (b) 49. in 0.500 liter of 0 100 M 2. Horv long rvould it take to electrodeposit all of the Ctt*2 CuSOr rvith a current of 2.20 amP? 96,500 coulornbs pass 3. Calculate (a) the number of grams of Clz liberated rvhen at STP throush an HCI solution, una (U) the volume of Hz liberated solution for 20 hours I T. A current of 3.0 amp is passed through an aqueous HzSOr volume of hydrogen liberated Calculate (a) the rveighioloxygen liberate6 and (b) the at STP. amp to deposit 127 grams ). Calculate the number of hours required for a current of 4-0 of electrons is involved in of copper from a solution of copper sulfate. What number the above electrolYsis? grams of iron from a solution of 6. Horv many.coulombs will be required to plate out 5.6 Iron (III) chloride? the cathode rvhen 0 10 g of Calculate the number of electrons that must be gained at the oxidation state of the silver is electroplated on a metal serving tray. (Assume.that are required to provide this silr,er in the plating solution is +1). Ho* many coulombs number of electrons? Hoslong must a 1.5-ampere current flouto supplv this number of coulornbs? in a $ater A salt known to contain platinum and chloride ions only was electrolyzed The cathode rvas then solution until 300 coulombs had passed through the solution deposit of elemental ,e*oued, dried and weighed. The gain in weight due to the platinum was 0.152 g. Write the formula of the salt JOma

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