We are able to determine the percentage of aluminum and zinc in analuminum-zinc

Question

We are able to determine the percentage of aluminum and zinc in analuminum-zinc alloy by figuring out the amount of hydrogen molesmade by their reaction with hydrochloric acid HCl, and theirrespective balanced chemical equations. The question is: which of the following alloys can be analyzed by the samemethod of experiment? -show the balanced chemical equations for the alloys that canbe analyzed
- or give reasons why some alloys cannot be analyzed by thismethod
The alloys are the following: -Fe/Ni

-Cu/Sn

-Cu/Ag

The question is: which of the following alloys can be analyzed by the samemethod of experiment? -show the balanced chemical equations for the alloys that canbe analyzed
- or give reasons why some alloys cannot be analyzed by thismethod
The alloys are the following: -Fe/Ni

-Cu/Sn

-Cu/Ag

Explanation / Answer

First, to figure the % of elements in alloy, we need 2 information:mass of alloy and mole of H2 is made. Therefore, look at 3 alloy, Cu/Ag is an alloy that can't bedetermined by this method since it doesn't react with HCl. =>Fe/Ni and Cu/Sn can be.    Fe/Ni can react with HCl. Fe + 2HCl -->FeCl2+ H2                                         2Ni + 6HCl--> 2NiCl3 + 3H2    Cu/Sn: Even though Cu can't react but Sn can. use moleof H2 that is made by Sn reaction to find the %           Sn + 4HCl--> SnCl4 + 2H2

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