and this explanation is making this assumption. Then, moles is converted to grams. Potassium dichromate is an ionic compound consisting of two potassium cations and one dichromate anion. Potassium Permanganate (KMnO 4) is an inorganic chemical compound. ... Potassium permanganate, KMnO4, is an ionic compound between a potassium ion, K+, and the polyatomic ion permanganate. and when we have the molar mass of the KMnO4 = 158/mol we can get the number of moles of KMnO4 = mass of KMnO4 / molar mass of KMnO4 no.of moles of KMnO4 = 32.45 / 158 = 0.2 mol when the no.of moles is less than 0.35 ∴KMnO4 will not dissolve because the number of moles is less than 0.35 mol that given in the question. Molar mass Let's assume that this is the case. Home » Chemistry » Potassium Permanganate. Potassium permanganate tablets can also be used. The molar mass of potassium permanganate is 158 g/mol. KMnO4 is a dark purple crystal at room temperature. Now, I think that you're supposed to assume that adding that much potassium permanganate to 30.0 mL of water will not change the volume of the solution. The molar mass of Fe(NH 4) 2 (SO 4) 2. Formula: KMnO4. % composition O: 64/158=0.405=40.5%. To find the equivalent mass, divide that molar mass by the mols of electrons taken in its half reaction. If using 400 mg tablets, add one to each 4 L of water. Its melting point is 240 ̊C (464 ̊F), density 2.7 g/cm3. Potassium permanganate, or KMnO4, has a molar mass of 158g/mol. That would be five. molar mass KMnO 4 = 158.04 g/mol; Unknown . Formula and structure: The chemical formula of potassium permanganate is KMnO 4 and its molar mass is 158.034 g/mol. KMnO4 is a strong oxidizing agent. Name: Potassium Permanganate. The molar mass of a potassium permanganate is 158.04 grams per mole.This is to say that the mass of one mole of potassium permanganate is 158.04 grams or that 6.02 x 10 to the 23rd power ions of potassium permanganate have a mass of 158.04 grams. When 119 g of potassium permanganate is dissolved into water to make 3.00 L of solution, the molarity is 0.250 M. mass KMnO 4 = ? The coordination geometries around the chromium atoms are tetrahedral. We calculate the molar mass of Potassium permanganate (KMnO4) by adding the atomic masses of K, Mn and O (Note: there are 4 atoms of O) The atomic masses are as follows K = 39 Mn = 55 O = 16 The molar mass of KMnO4 = 39 + 55 + 16x4 = 158 g/mol One mole of KMnO4 in a liter of water is 158.75 gms and is a one molar solution. Potassium Permanganate KMnO4 Molar Mass, Molecular Weight. It is soluble in water. The number of moles of anything is calculated from the mass of sample and the molar mass. First I’m assuming that the no actually means ml. % composition of Mn: 55/158=0.348=34.8%. A compound has a molar mass of 123.22 g/mol. A potassium permanganate solution is made by dissolving crystals or powder in water aiming for a 1-in-10,000 solution. Step 2: Solve. % composition of K: 39/158=0.247=24.7%. Step 3: Think about your result. Based on information from the periodic table, which of the following is the molecular formula of a substance that has this molar mass? Molar Mass: 158.0339. g; Moles of solute is calculated by multiplying molarity by liters. 6H 2 O is 392.2 g. (39+55+16x4). ENDMEMO. Use potassium permanganate's molar mass to find the number of moles you have It is an ionic compound composed of the potassium cation (K +) and the permanganate anion (MnO 4-), in which the manganese atom is attached to four oxygen atoms through three double bonds and one single bond.The manganese metal is in the +7 oxidation state in this salt.