A $100.0\, mL$ dilute solution of $Ag ^{+}$is electrolysed for $15.0$ minutes with a current of $1.25 \,mA$ and the silver is removed completely. What was the initial $\left[ Ag ^{+}\right]$?
- $2.32 \times 10^{-1}$
- $2.32 \times 10^{-4}$
- $2.32 \times 10^{-3}$
- $1.16 \times 10^{-5}$
The Correct Option is D
Solution and Explanation
$A g^{+}=\frac{15 \times 60+1.25 \times 10^{-3}}{96,500} \times \frac{1}{1}$
$=0.0116 \times 10^{-3}$
$\therefore\left[A g^{+}\right]=\frac{1.16 \times 10^{-5}}{\frac{100}{1000}}$
$=1.16 \times 10^{-4}$
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Concepts Used:
Electrolysis
Electrolysis:
Electrolysis is the process by which an element is decomposed and undergoes some chemical change under the influence of any electric current. The first-ever electrolysis was executed out by Sir Humphrey Davey in the year 1808. Electrolysis can occur in both Galvanic cells and Electrolytic cells.
Applications of Electrolysis:
- Electrolytic cells are used for the production of Hydrogen and Oxygen gas from water.
- They are used for the large-scale production of pure metals like sodium, copper, magnesium, etc.
- They are used to extract Aluminium from Bauxite.
- Electrolytic cells are used for electroplating, a process by which a thin protective layer of one metal is formed over another metal, mostly for protection.
- Electrolysis is used for the electrorefining of non-ferrous metals.
Read More: Products of Electrolysis