1.

Calculate the weight of MnO_(2) required to react with HCl having specific gravity 1.2gm//ml. 4% by mas necked to produce 1.8L of Cl_(2) at STP by reaction.

Answer»


Solution :`MnO_(2)+4HClto MnCl_(2)+Cl_(2)+2H_(2)O`
`100gm` SOL CONTAINS `4gm HCl`
`100/1.2 ML` sol contains `4 GM HCl`
`nCl_(2)=1.8/22.4=0.0805`
`W_(MnO_(2))=0.0805xx87=8gm`


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