(B) Involving Mass-Volume Relations...
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(B) Involving Mass-Volume Relationship 9. What volume of oxygen at 18°C and 750 mm pressure can be obtained from 10 g of potassium chlorate ? 10. What mass of iodine is liberated from a solution of potassium iodide when 1 litre of chlorine gas at 10° C and 750 mm pressure is passed through it?

JEE/Engineering Exams
Chemistry
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Solution: We know PV = n RT ( 0.9868 times 1=n times 0.082 times 283 ) ( mathrm{n}=0.042 mathrm{mol} ) 1 mole of Kl reacts with 1 mole of ( mathrm{Cl}_{2} ) to form 1 mole of ( mathrm{I}_{2} ) So 0.042 mole of ( mathrm{KI} ) reacts with 0.042 mole of ( mathrm{Cl}_{2} ) to form 0.042 mole of ( mathrm{I}_{2} ) Amount of ( mathrm{I}_{2} ) liberated ( = ) No. of moles ( mathrm{x} ) molar mass ( =0.042 mathrm{x} ) ( 253.81=10.793 mathrm{g} )
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