3 Zn + Cr2O72- + 14 H+ → 3 Zn2+ + 2 Cr3+ + 7 H2O
When zinc dust is added to an acidified solution of potassium permanganate, a redox reaction takes place. The zinc reduces the permanganate ion, MnO4-, to form colorless manganese ions, while itself getting oxidized to zinc ions. The overall result is that the purple color of the permanganate solution fades as it is reduced.
When acidified potassium permanganate is added to an alkene, the purple color disappears due to the reduction of permanganate ions to colorless manganese dioxide. The alkene oxidizes the permanganate ions, causing them to be reduced and lose their color. This reaction is used to test for the presence of carbon-carbon double bonds in organic compounds.
When potassium permanganate is added to water, the water changes color to a pink or purple hue. This is because potassium permanganate is a strong oxidizing agent that reacts with organic compounds present in the water, causing the color change.
Water turns colored when potassium permanganate is added because the potassium permanganate crystals dissolve, releasing the purple permanganate ion (MnO4-) into the water. The permanganate ion absorbs light in the visible spectrum, giving the water a pink or purple color.
The chemical equation for this reaction is: 5Fe^2+ + MnO4^- + 8H^+ -> 5Fe^3+ + Mn^2+ + 4H2O In this reaction, the purple color of potassium permanganate (MnO4^-) is removed as it is reduced to colorless manganese ions (Mn^2+) by the ferrous ions (Fe^2+) in the acidified solution.
When zinc dust is added to an acidified solution of potassium permanganate, a redox reaction takes place. The zinc reduces the permanganate ion, MnO4-, to form colorless manganese ions, while itself getting oxidized to zinc ions. The overall result is that the purple color of the permanganate solution fades as it is reduced.
Potassium permanganate and sulfite:2MnO4-(aq) + 5SO32-(aq) + 6H+(aq) --> 5SO42- + 2Mn2+(aq) + 3H2O(l)Note:Potassium and sodium ions do NOT react, they are tribune-ions
When acidified potassium permanganate is added to an alkene, the purple color disappears due to the reduction of permanganate ions to colorless manganese dioxide. The alkene oxidizes the permanganate ions, causing them to be reduced and lose their color. This reaction is used to test for the presence of carbon-carbon double bonds in organic compounds.
When potassium permanganate is added to water, the water changes color to a pink or purple hue. This is because potassium permanganate is a strong oxidizing agent that reacts with organic compounds present in the water, causing the color change.
Water turns colored when potassium permanganate is added because the potassium permanganate crystals dissolve, releasing the purple permanganate ion (MnO4-) into the water. The permanganate ion absorbs light in the visible spectrum, giving the water a pink or purple color.
The chemical equation for this reaction is: 5Fe^2+ + MnO4^- + 8H^+ -> 5Fe^3+ + Mn^2+ + 4H2O In this reaction, the purple color of potassium permanganate (MnO4^-) is removed as it is reduced to colorless manganese ions (Mn^2+) by the ferrous ions (Fe^2+) in the acidified solution.
The color of potassium permanganate does not disappear when excess is added because it is a self-indicating compound. When there is excess potassium permanganate present, it remains in its colored form (purple) to signal that the reaction is complete or that there are no reducers left to interact with.
When potassium permagnate is added initially to ethanol, ethanol gets oxidised into ethanoic acid using potassium permagnate. Thus, decolorizing potassium permagnate. When excess is added , the color of potassium permagnate persists.
Potassium permanganate can potentially alter the surface tension of water, as it is a strong oxidizing agent. When added to water, it can break down organic compounds and reduce the surface tension. However, the effect may vary depending on the concentration of potassium permanganate and other factors.
The color of potassium permanganate does not disappear when excess ethanol is added because ethanol is unable to fully reduce the permanganate ion (MnO4-) to colorless manganese dioxide (MnO2). Ethanol is a weak reducing agent and is not capable of completely reducing the permanganate ion in this reaction. Additionally, the reaction between potassium permanganate and ethanol is not stoichiometric, meaning that there is an excess of one of the reactants, which can also contribute to the color persisting.
Potassium permanganate and bisulfite in stronger acid environment:2MnO4-(aq) + 5HSO3-(aq) + H+(aq) --> 5SO42- + 2Mn2+(aq) + 3H2O(l)Note:Potassium and sodium ions do NOT react, they are tribune-ions.
When potassium permanganate is added to butter, it will react with any unsaturated fats present in the butter, causing them to oxidize. This oxidation can lead to the formation of off-flavors and odors in the butter, making it unpleasant to consume. Additionally, potassium permanganate is a strong oxidizing agent that can also break down other components in the butter, affecting its consistency and texture.