If a current of 2.5A flows through an electrolyte for 3 hours and 1.8g of a substance is deposited, what is the mass of the substance that will be deposited...

Assessment: JAMB UTME - Physics - 2013 Subject: Physics

Question 1 Report

If a current of 2.5A flows through an electrolyte for 3 hours and 1.8g of a substance is deposited, what is the mass of the substance that will be deposited if a current of 4A flows through it for 4.8 hours?

2.4g

3.2g

4.6g

4.8g

Answer Details

First let's find z

z = $\frac{M}{I t}$

z = $\frac{1.8}{2.5 \times (3 \times 60 \times 60)}$

Therefore, the new M equals

M = zIt

M = $\frac{1.8 \times 4 \times 4.8 \times 60 \times 60}{2.5 \times 3 \times 60 \times 60}$

M = 4.6g

Read lesson note on Current Electricity (JAMB)

Current Electricity

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