how to calculate oxidation number of fe in feso4.(nh4)2so4.6h2o Share with your friends Share 1 Mayank answered this I will answer in 10 minutes 0 View Full Answer $hâ®m¡ñ Mâ|ík answered this So answer it 1 Hrugved Pondey answered this Fe=2 1 Hrugved Pondey answered this Please find this answer 1 Hrugved Pondey answered this Oxidation state of SO4=-2.....oxidation state of NH4=+1...Water is electrically neutral=0 so as per photo which is above...see it.... 0