Iodine and chlorine react together to form compound X (ICln).
When 0.0010 mol of X was reacted with an excess of KI(aq), all of its iodine was converted into I2. The iodine liberated required 40.0 cm3 of 0.10 mol/dm3 sodium thiosulfate, Na2S2O3, for complete reaction.
Calculate the value of n in ICln.
Originally posted by Pinkbow6826:Iodine and chlorine react together to form compound X (ICln).
When 0.0010 mol of X was reacted with an excess of KI(aq), all of its iodine was converted into I2. The iodine liberated required 40.0 cm3 of 0.10 mol/dm3 sodium thiosulfate, Na2S2O3, for complete reaction.
Calculate the value of n in ICln.
Identify the reactants and products :
Reactants : ICln, KI
Products : I2, KCl
Let the coefficient of ICln be 1.
To balance the chlorine, coefficient of KCl must be n.
To balance the potassium, coefficient of KI must be n.
To balance the iodine, coefficient of I2 must be (n+1)/2
Accordingly, write the balanced equation (using coefficients above) for the reaction between ICln and KI to generate I2 and KCl.
By stoichiometry of the balanced redox equation (between iodine and thiosulfate), we note that each mole of ICln generates 2 moles of I2.
By stoichiometry of the balanced reaction between ICln and KI, this implies (n+1)/2 = 2, hence n = 3