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  4. When acidified K2Cr2O7 solution is added to Sn2+ salts then Sn2+ changes to

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Q. When acidified $ {{K}_{2}}C{{r}_{2}}{{O}_{7}} $ solution is added to $ S{{n}^{2+}} $ salts then $ S{{n}^{2+}} $ changes to

VMMC MedicalVMMC Medical 2014

Solution:

$ C{{r}_{2}}O_{7}^{2-}+14{{H}^{+}}+3S{{n}^{2+}}\xrightarrow[{}]{{}}2C{{r}^{3+}}+3S{{n}^{4+}} $ $ +7{{H}_{2}}O $