when the iron cr2 O72- acts as an oxidant in acidic aqueous solution the ion Cr3+ is formed how many moles of Sn2+ would be oxidised to Sn4+ by 1 mole of Cr2O72- ions
siril:
it cannot be 'accident'....it is probably 'oxidant'
although the answer is 3
yes.. i know it is oxidant. accident typed by mistake
please solve this problem
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Sn⁺² + Fe⁺²Cr₂O₇⁻² ----------------> Fe⁺² + Cr⁺³ + Sn⁺⁴
Change in oxidation state of Sn⁺² is 4 - 2 = 2 = n-factor
Change in oxidation state of Cr⁺³ for 2 atoms is 2(6 - 3) = 2(3) = 6 = n-factor
In any reaction, "moles x n-factor" must be same on both sides of reaction.
1 x 6 = n moles x 2
6 = n x 2
n = 3
Therefore 3 moles of Sn⁺² can be oxidized by 1 mole of Cr₂O₇⁻²
Change in oxidation state of Sn⁺² is 4 - 2 = 2 = n-factor
Change in oxidation state of Cr⁺³ for 2 atoms is 2(6 - 3) = 2(3) = 6 = n-factor
In any reaction, "moles x n-factor" must be same on both sides of reaction.
1 x 6 = n moles x 2
6 = n x 2
n = 3
Therefore 3 moles of Sn⁺² can be oxidized by 1 mole of Cr₂O₇⁻²
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