Alloy is a substance formed from the combination of two or more metals. It can be combinations of other elements also. To determine the chemical composition of an alloy (or any metal) are X-ray fluorescence spectroscopy (XRF) and optical emission spectroscopy (OES) are the two main methods used.
How to find weight composition of an alloy?
Given data
The composition of alloy is:
CAg=94.1%, Ag=0.941C
Ccu=5.9%, Cu=0.059C
The atomic weight of Ag is: WAg=107.87g/mol
The atomic weight of Cu is: WCu=63.55g/mol
The percentage composition for Ag.
PCAg=CAgWAgCAgWAg+CCuWCu×100PCAg=CAgWAgCAgWAg+CCuWCu×100
Substitute the given value.
PCAg=0.941×107.87g/mol0.941×107.87g/mol+0.059×63.55g/mol×100
=96.43%PCAg
=0.941×107.87g/mol0.941×107.87g/mol+0.059×63.55g/mol×100
Thus main answer is =96.43%
The percentage composition for Cu.
PCCu=CCuWCuCAgWAg+CCuWCu×100PCCu=CCuWCuCAgWAg+CCuWCu×100
Substitute the given value.
PCCu=0.059×63.55g/mol0.941×107.87g/mol+0.059×63.55g/mol×100
=3.56%PCCu
=0.059×63.55g/mol0.941×107.87g/mol+0.059×63.55g/mol×100
Thus, main answer is =3.56%
Thus, the percentage composition of Ag is 96.43%96.43% and percentage composition of Cu is 3.56%3.56%.
So, the option (b) is correct.
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