The sediment of a lake-its muddy bottom layer-contains relatively high concentrations of nitrogen and phosphorus. These can be released to water, particularly under conditions of low oxygen concentrations. The nutrients in the sediment come from the past settling of algae and dead organic matter.
Potassium permanganate is an inorganic chemical compound with the chemical formula KMnO 4. It is a salt consisting of K+ and MnOâ 4 ions. Formerly known as permanganate of potash or Condy's crystals, it is a strong oxidizing agent.It dissolves in water to give intensely pink or purple solutions, the evaporation of which leaves prismatic purplish-black glistening crystals.In 2000, worldwide production was estimated at 30,000 tonnes.Using sodium hydroxide the end product is not sodium manganate but an Mn(V) compound which is one reason the potassium permanganate is more commonly used than sodium permanganate. Furthermore the potassium salt crystallizes better).
1.Sodium is represented as Na while potassium is represented as K. 2.The atomic number of sodium is 11 while that of potassium is 19. 3.The density of sodium is greater than that of potassium. 4.Sodium burns in a Bunsen flame imparting a golden-yellow color while potassium burns with a pale, violet flame. 5.Both react with water producing hydrogen gas, but the reaction of potassium is much more violent as compared to that of sodium.