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    				| 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"` | |