Use potassium permanganate's molar mass to find the number of moles you have and this explanation is making this assumption. The molar mass of potassium permanganate is 158 g/mol. The molar mass of Fe(NH 4) 2 (SO 4) 2. When 119 g of potassium permanganate is dissolved into water to make 3.00 L of solution, the molarity is 0.250 M. Molar Mass: 158.0339. Potassium permanganate tablets can also be used. Its melting point is 240 ̊C (464 ̊F), density 2.7 g/cm3. Step 2: Solve. Potassium dichromate is an ionic compound consisting of two potassium cations and one dichromate anion. If using 400 mg tablets, add one to each 4 L of water. That would be five. 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. ... Potassium permanganate, KMnO4, is an ionic compound between a potassium ion, K+, and the polyatomic ion permanganate. It is soluble in water. % composition O: 64/158=0.405=40.5%. Based on information from the periodic table, which of the following is the molecular formula of a substance that has this molar mass? ENDMEMO. Potassium Permanganate (KMnO 4) is an inorganic chemical compound. % composition of Mn: 55/158=0.348=34.8%. To find the equivalent mass, divide that molar mass by the mols of electrons taken in its half reaction. A compound has a molar mass of 123.22 g/mol. Formula and structure: The chemical formula of potassium permanganate is KMnO 4 and its molar mass is 158.034 g/mol. The coordination geometries around the chromium atoms are tetrahedral. molar mass KMnO 4 = 158.04 g/mol; Unknown . Home » Chemistry » Potassium Permanganate. First I’m assuming that the no actually means ml. A potassium permanganate solution is made by dissolving crystals or powder in water aiming for a 1-in-10,000 solution. The number of moles of anything is calculated from the mass of sample and the molar mass. One mole of KMnO4 in a liter of water is 158.75 gms and is a one molar solution. mass KMnO 4 = ? Potassium permanganate, or KMnO4, has a molar mass of 158g/mol. 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 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. 6H 2 O is 392.2 g. 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. % composition of K: 39/158=0.247=24.7%. KMnO4 is a dark purple crystal at room temperature. Let's assume that this is the case. Formula: KMnO4. 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. Name: Potassium Permanganate. g; Moles of solute is calculated by multiplying molarity by liters. Then, moles is converted to grams. Potassium Permanganate KMnO4 Molar Mass, Molecular Weight. Molar mass (39+55+16x4). Step 3: Think about your result. KMnO4 is a strong oxidizing agent. In water aiming for a 1-in-10,000 solution is calculated by multiplying molarity by liters has this molar mass potassium solution. 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