The passage of a current of 0.750A for 25.0 min deposited 0.369 g of copper from a solution. From this information, the molar mass of copper is 63.3u.
How to calculate the molar mass of copper?
First we will convert the time from mins to sec,
Hence,
Time = 25min = 25*60 sec
Current = 0.75A
Electricity passed is given by:
[tex]Q=I\times T \\Q=0.75 \times25\times60\\Q=1125C[/tex]
The reaction that will take place is:
[tex]Cu^{2+}+2e^_- } \rightarrow Cu[/tex]
Hence, there are 2 atoms of copper.
We know, Faraday's number is 96500, and as there are 2 atoms of copper, therefore, the value of Z = 96500*2.
We are given that the deposited mass is 0.369g
Hence, the molar mass of copper will be:
[tex]M=\frac{2\times 96500 \times 0.369}{1125}=63.3u[/tex]
To learn more about atomic mass, refer to:
brainly.com/question/17067547
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