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# The electrochemical equivalence of silver is 0.0012g/C…

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**The electrochemical equivalence of silver is 0.0012g/C. 36.0g of silver is to be deposited by electrolysis on a surface by passing a steady current for 5.0 minutes, the current must be**

**A. 6000A**

**B. 100A**

**C. 10A**

**D. 1A**

**QUICK ANSWER…**

**B**

**EXPLANATION…**

**M = ZIT**

**Where M = mass = 36g,**

**Z = ****electrochemical equivalence = 0.0012g/C,**

**T = time = 5 minutes = 5 x 60 = 300 seconds.**

**I = current = ?**

**Therefore I = M/ZT = 36/(0.0012 x 300) = 36/ 0.36 = 100A**

**Now for the right answer to the above question:**

**Option A is incorrect.****Option B is correct.****C is incorrect.****D is not the correct answer.**

**HELPFUL TIPS…**

**You may please note these/this:**

**Faraday’s first law of electrolysis can mathematically be represented as M = ZIT.**

**Use the questions and answers session to correct, express, and contribute your views.**

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**/ culled from 2018 JAMB-UTME physics question 13 /**

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