Chemistry: What mass of aluminum can be plated onto an object in 755 minutes at 5.80 a of current? what mass of aluminum can be plated onto an object in 755 minutes at 5.80 a of current? 73.5 g 24.5 g 147 g 220. g 8.17 g?

B. A transverse and longitudinal...

What mass of aluminum can be plated onto an object

acharity196

13.03.2022

24.5 g

Explanation:

$Q=I\times t$

where Q= quantity of electricity in coloumbs

I = current in amperes = 5.80 A

t= time in seconds =755 min = $755\times 60=45300s$

$Q=5.80A\times 45300s=262740C$

$Al^{3+}+3e^{-1}\rightarrow Al$

$96500\times 3=289500Coloumb$ of electricity deposits 1 mole of Al.

262740C of electricity deposits = $\frac{1}{289500}\times 262740=0.90mole$ of Zn.

Mass of aluminium= $moles\times {\text {Molar mass}}=0.90\times 27=24.5g$

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