March 04, 2021, 01:28:51 AM
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Topic: alloy treated with acid  (Read 250 times)

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Offline LucaZombini

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alloy treated with acid
« on: February 11, 2021, 06:21:33 PM »
5g of a zinc/copper alloy are attacked with acid and 7dm3 of gas developed as a result. calculate the percentage of copper (standard conditions). I don't know the solutions, actually. It seems easy but i can barely start the problem.

ntot = 7/22,7 = 0,308 mol.

i can't go further.


Online AWK

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Re: alloy treated with acid
« Reply #1 on: February 12, 2021, 12:24:36 AM »
What acid? There are acids that react only with zinc, but there are also acids that react with zinc and copper.
In addition, 5 g of pure zinc will release with acid only 1.7 liters of gas.
AWK

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