Q. 175.0( 1 Vote )

(a) Complete the

Answer :

(a) (i) Na2Cr2O7 + 2KCl K2Cr2O7 + 2NaCl

(ii) 2MnO4- + 5SO32- + 6H+ 2Mn2+ + 5SO42- + 3H2O

(b) The orange colour of Cr2O72– ion changes to yellow when treated with an alkali because of formation of chromate ion i.e. CrO42-.

Cr2O72– + 2OH- 2CrO42– + H2O

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