The difference in the ‘spin-only’ magnetic moment values of and the manganese product formed during titration of against oxalic acid in acidic medium is ____

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Substance	Electronic configuration of metal ion	Number of unpaired electrons (n)	Spin only magnetic moment ( $μ$ ) = $\sqrt{n (n + 2)}$ BM
${KMnO}_{4}$	${Mn}^{7 +} = {}_{18}{[Ar]} 3 d^{0} 4 s^{0}$	0	0 BM
${Mn}^{2 +}$	${Mn}^{2 +} = {}_{18}{[Ar]} 3 d^{5} 4 s^{0}$	5	$\sqrt{5 (5 + 2)} BM$ = 5.92 BM