In a class experiment,a strip of copper is placed in a sliver nitrate solution.
Initial mass of copper strip= 4.36g
Final mass of coper strip=2.21g
a) Write a chemical equation for the reaction involved.
b) What is the mass of silver formed in the reaction?
(Relative atomic masses: Cu=63.5, Ag=108)
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2008-04-06 9:15 pm
回答 (1)
2008-04-06 9:48 pm
✔ 最佳答案
a) Cu + 2AgNO3 ---------> Cu(NO3)2 + 2Agb) the mass of copper used=4.36-2.21=2.15
the no. of mole of copper used=2.15/63.5
the molar ratio of copper to silver is1:2
therefore, the no. of mole of silver formed=2x2.15/63.5
the mass of silver formed=2x(2.15/63.5)x108
=7.31g
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