Question

: Chlorine dioxide (C102) has been tested as a disinfectant for water treatment and is produced by the following reaction 2NaClO2(aq) + Cl2(g) → 2C102(g) + 2NaCl(aq) a) Calculate Eº, AGº and K at 25°C for the production of ClO2 using appropriate data. b) A major concern for using C1O2 as a disinfectant is that a possible by-product, the chlorate ion (CIO3-) could be produced as follows ClO2(g) = C103-(aq) + Cl-(aq) Balance the above equation.

Answer 1

in the above image the process of solution is explained ..for finding the value of cell constant , cell potential and free energy.

o 2 NaClO2 (aq) + Cl₂ (g) (a) Reduction - Cl2 + 20 - oxidation - 2010 - ine Clon+ 20 20102 +2 Nacio) 200 + 1.36 20102 + 20 = 0.954 CO2 = 6 = -0.954 Κορ, + Eo = 1.36- 0.954 = 0.406 • fos- faes Froogy → Aco = -After AG = nFe çn=2 from balance I electoodo potential s. - 2 x 96,435 x 0.406 = - 78345.82 J Sf=96,4853 = - 78 KI a Fork :- r Log K = 0.059² log k = 13.76 K = 946,002'036 - 9.46 x 105 Cappaox). (b) 2010g + 2010 + 4H+ - Co & 20102 + 2H2O poo-15- i Noite the unbalanced skin i) sepedate the poocess into half seactions. 11) Identify and woite all te sodox couples in deaction combina sodox couples into two half deactions. Balance the atom in each half seaction 1 Balance the chasge or both sida of searti with Balance the oxygen atom viti Mako electoor gain equal to electoor last ix) Add hoolf reaction together x) Simplify the equation.