Manganous solution

The green color of manganate solution turns purple due to the permanganate formed. 

Pour a small amount of copper sulphate, silver nitrate, and potassium manganate solutions into three beakers and drop a small piece of white phosphorus into each of them. In 10 or 15 minutes, extract the phosphorus from the solutions. Dry it as indicated above, put it on an iron plate, and heat it. What happens How do the given salts affect white phosphorus How can the different activity of white and red phosphorus be explained Write the equations of [the [reactions. 

Properties of Manganates. 1. Pour 1 ml of the prepared potassium manganate solution into each of two test tubes, greatly dilute the solution in one tube with water, add 2-3 ml of water to the other tube and pass a stream of carbon dioxide through it. How and why does the colour of the solution in both cases change Write the equations of the relevant reactions. 

Add a few drops of ethanol to a potassium manganate solution and carefully heat it. What happens Write the equation of the reaction. 

Pour a part of the potassium manganate solution into a small beaker and add a saturated barium chloride solution to it up to complete precipitation. What precipitates ... 

Permanganate. Sodium permanganate, permanganate of soda, [CAS 10101-50-5], NaMn0 3H20. purple solid, soluble, formed by oxidation of acidified sodium manganate solution with chlorine, and then evaporating. Used (1) as disinfectant and bactericide, (2) in medicine. 

The reaction is conducted as follows the flask containing the manganate solution is cooled to — 196° (liquid nitrogen) and... 

Permanganates can be made by electrolytic oxidation in two ways. In one method an anode of manganese or a manganese alloy is used, with potassium carbonate solution as the electrolyte in the second method a potassium or sodium manganate solution, obtained by alkaline oxidation of manganese dioxide, is oxidized to permanganate at an iron anode. The second method is the one usually used commercially. Both methods are illustrated in this experiment. 

The electrolytic oxidation is performed in a two-compartment cell like that in Part A, but using a larger beaker. The anode solution may either be in the beaker or in the porous pot. The anode is preferably of nickel gauze, but a spiral of thick iron wire is also satisfactory. The cathode is a small spiral of thick iron wire. The cathode solution is IM potassium hydroxide, the anode solution the potassium manganate solution prepared above. The anode solution should be kept stirred during the electrolysis, either by a stream of filtered air or by a mechanical stirrer. The temperature is 30° or below. The lower the current density at the anode, the better the yield, but a current density of 0.1 amp/ cm is satisfactory. Pass a current of about 2 amp. 

The process of auto-oxidation-reduction is also used manganate ion is stable in alkaline solution, but not in neutral or acidic solution. The addition of any acid, even carbon dioxide (carbonic acid), to a manganate solution causes the production of permanganate ion and the precipitation of manganese dioxide ... 

Limit of Identification 0.05 y silver Limit of Dilution 1 1,000,000 Reagents Manganic Solution. 0.6 g manganese sulfate is dissolved in 60 ml water and 20 ml concentrated hydrochloric acid. Ten ml of a 0.1 N KMn04 solution is added, and the mixture well shaken. 15 ml of this solution is diluted with 50 ml of 1 2 hydrochloric acid. 

AHC Oberflachentechnik GmBH Mag Pass Vanadate, molybdate, and manganate solution... 

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