Hi, i wonder how could i calculate the number of grams of ethanedioate ion, C2O42- in one dm3 Given: FA1 was made by dissolving 6 g of metal ethanedioate, MC2O4 is dissolved in dilute sulpuhric acid and making up to 1 dm3 with pure water. FA2 contains 2.38g of manganate (VII) ion per dm3. 25.0 cm3 of FA1 requires 19.65 cm3 of FA2 for complete reaction. As i'm pretty weak in chemistry, i tried my best to solve the question. I used the (MAVA)/(MBVB) = ratio/ratio method. But not sure if i'm right. I also cannot differentiate if its suppose to be concentration or just pure mass. can someone help me here? FA2 contains 2.38g of manganate (VII) ion per dm3. does it means it have 2.38g (mass) or 2.38gdm-3 (concentration) ?