Preparation of 0.1M standard solution of oxalic acid â Equivalent weight of oxalic acid = molecular weight / number of electrons lost by one molecule = 126/2 = 63 pbsm7028 is waiting for your help. C. One-third of its molecular weight. For example: In potassium permanganate, permanganate ion is the active ion. For Mn+7 going to Mn+2, 5 electrons are gained, so the equivalent weight is the molecular weight divided by 5. 17.6k +. In equivalent weight. 158/5 = 31.6 grams/equivalent. are solved by group of students and teacher of NEET, which is also the largest student community of NEET. Solution for why is equivalent weight of KMnO4 is different in acidic, alkaline and neutral medium ? Molecular mass of KMno4 = 158.04g. Potassium permanganate react with oxalic acid and sulfuric acid. In Acidic medium, This Mn+7 goes to Mn+2 state and hence there is a net gain of 5 electrons. Mno4- + 2H20 + 3e- â> MnO2 + 4OH- (n=3) Eq wt = 158.04/3 = 52.68g/Equivalent. Although KMnO 4 acts as an oxidi sing agent in alkaline medium also , for quantitative analysis mostly acidic medium is used. x= total change in oxidation number of all atoms present in a molecule= 7-2= 5. equivalent weight= (molecular weight)/x= 157/5u. of electrons involved n is: MnO 4- + 8H + +5e - ---> Mn +2 + 4H 2 O So, equivalent mass = molar mass/ electrons involved = 158/ 5 â¦ Apparatus Setup â Potassium permanganate solution should be taken in the burette and oxalic acid solution should be taken in conical flask. ... Login. The same as its molecular weight. Formula weight of KMnO4 is 158.04. B The equivalent weight of KMnO4 in basic medium is 158. The Questions and Answers of When potassium permanganate is titrated against ferrous ammonium sulphate, the equivalent weight of potassium permanganate is a) Mol. Thus, potassium permanganate reacting by double decomposition has an equivalent weight equal to its gram molecular weight, 158.038/1 g; as an oxidizing agent under different circumstances it may be reduced to the manganate ion (MnO 4 2-), to manganese dioxide (MnO 2), or to the manganous ion (Mn 2+), withâ¦ …, > N204 > N205(c) N2O > NO > N2O3 > N204 > N2O5(d) N2O5 > N204 > N203 > NO > NO​, Write a balanced chemical equation for the reaction of solid manganese(III) oxide with hydrogen gas to form solid manganese(II) oxide and liquid water, ek ye hai inke pas inbox power v h fir v memes hi share krna h xD...​. The equivalent weight of KMnO4 in alkaline medium will be (a) 31.60 (b) 52.66 (c) 79.00 (d) 158.00 The equivalent weight of KMnO4 is 31.6 grams in acidic medium. Eq wt = 158.04/5 = 31.61g/equivqlent. That would be five. Eq wt = 52.6g/Equivalent Wt./10 b) Mol. Below is the explanation: The Mn in KMnO4 exists in +7 state. In other words, change in oxidation state of KMnO4 in acidic medium is 5. Practice and master your preparation for a specific topic or chapter. In Acidic medium, This Mn+7 goes to Mn+2 state and hence there is a net gain of 5 electrons. Options (a) M/6 (b) M/5 (c) M/4 (d) M/3. The origin of carbon compounds is chemistry. The Mn in KMnO4 exists in +7 state. Potassium permanganate is an inorganic compound with the chemical formula KMnO 4 and composed of K + and MnO â 4.It is a purplish-black crystalline solid, that dissolves in water to give intensely pink or purple solutions. A. The equivalent weight of a compound is its molecular weight divided by its valence (number of electrons gained or lost by one molecule or ion of the substance in the reaction). To determine the strength of potassium permanganate by titrating it against the standard solution of 0.1M oxalic acid. The equivalent weight depends on the reaction involved. STATEMENT-1: The equivalent mass of of in acidic medium is where M=molecular mass of