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2.2g of zinc chloride was obtained when 2g of brass is dissolved in excess dilute hydrochloric acid.Find the percentage of zinc in alloy?
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- pisgahchemistLv 74 years agoFavorite Answer
Percent in alloy....
Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g)
?g ............. .............. 2.2g
2.2g ZnCl2 x (1 mol ZnCl2 / 136.3g ZnCl2) x (1 mol Zn / 1 mol ZnCl2) x (65.4g Zn / 1 mol Zn) = 1.06g Zn
1.06g Zn / 2.0g alloy x 100 = 53% Zn ...... to two significant digits
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