Question

what volume of 3 molar HNO3 is needed to oxidize 8g of Fe2+ to Fe3+ ? HNO3 --> NO

Answer 1

HNO3 + 3 Fe2+ --------> 3 Fe3+ +side products

77 g 168 g

168 g of Fe2+ forms HNO3 = 77g

8 g of Fe2+ forms HNO3 = 77x8/168

= 3.67 g

molarity = 3M

molarity = w x 1000/Mx V

3 = 3.67 x 1000/77x V

V= 15.88 ml

Answer 2

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