1.

How many faradays of electricity are required to produce 6 g of Mg from `MgCl_(2)`?

Answer» `MgCl_(2) rarr Mg^(2+) +2Cl^(-)`
`Mg^(2+) +2e^(-) rarr Mg`
`because" "` 2 Moles of electron are required to produce 1 mole of Mg
2 moles of electrons = 2 faraday electricity
`"No. of moles of Mg"=("Mass of Mg")/("Molar mass of Mg")`
`=(6)/(24)=0.25" mole"`
`because " "` 1 mole of Mg required 2 faraday electricity
`therefore" "0.25` mole of Mg required `=(2)/(1)xx0.25`
`="0.50 faraday"`


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