Question

Suppose you are hired to haul away the waste left over from a place that develops film. It turns out the "waste" actually contains a lot of silver nitrate! You decide you will treat the waste with copper metal in order to recover the silver and cash in. The relevant equation is: 2 AgNO + Cu Cu(NO), + 2 Ag 169.89 g/mol 63.55 g/mol A stoichiometric calculation you need to work through for this type of scheme involves relat- ing how much copper it takes to react with a given amount of the silver nitrate. You need the molar masses of the silver nitrate and the copper as shown above. You also need a mol-to-mol ratio that relates the two different chemicals (silver nitrate and copper). From the balanced equation we can see that this ratio is 1 mol Cu/2 mols AgNO, 1. If the waste you have contains 100.0 grams of silver nitrate, how many mols of silver nitrate is this? (Use the molar mass of the silver nitrate from above!) 169.89 g/mol Ag NO₃ = 1.6989 mol 100.og Ag NO 2. If you found that your waste contained 0.5886 mols of silver nitrate, how many mols of copper would you need to react with it? (Use the mol-to-mol ratio! 1 mol Cu/2 mols AgNO3)

Answer 1

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one 169-89 mam mole Ag NU3 o- 58 8616 Moles 69-89 | mole 2 male AgNO3 cop pe moles o-6 86 O-588 6 O-2943 7moles coppes oould geac t with iE | mole OF 63-SS ga ms Cu o-2943 mole - -70 27 grams a 63-SS xo-244 3 x 63 SS 18-7027 I69-a goams