Potassium is an alkali metal and is a part of group 1. potassium is ur answer. Potassium tarnishes quickly in air due to a reaction of oxygen and moisture. Reaction with moist air. Those reactions are listed above. ! Sodium Azide, Potassium Nitrate, Silicon Dioxide are the initial reactants packed into the air bag module. Its atomic number is 19 and atomic weight is 39.098u. Potassium is a fine conductor of electricity and heat. 3.38 moles of sodium azide must be packed into the air bag module for the air bag to inflate(PV=nRT Expose it to air and it will quickly interact with oxygen and water vapor (which helps explain why you don't find it in nature). Its symbol is K taken from its Latin name Kalium. The typical flame colours for lithium (red) and sodium (yellow) can usually be seen and sometimes the lilac of the potassium flame. In chlorine: 2Na (s) + Cl 2 (g) → 2NaCl (s) and similarly for the others. Potassium - Potassium - Principal compounds and reactions with other elements: Of commercially produced potassium compounds, almost 95 percent of them are used in agriculture as fertilizer. Group 1 elements react with moist air. Visit Vedantu.com to read more about the Physical and Chemical Properties of Potassium. K + O2(g) = KO2 ΔG(20C) = -241.3kJ ΔH(20C) = -283.7kJ This reaction is spontaneous (ΔG negative), and HIGHLY exothermic (ΔH is highly negative). (Potassium compounds are also important to a lesser extent in the manufacture of explosives.) If potassium is burned in air, the result is mainly formation of orange potassium superoxide. The reactions are ongoing this way: Relatively free electrons of potassium reduce water: $$\ce{2 e- + 2 H2O -> H2 + 2 OH-}\tag{1}$$ That leaves metal positively charged. It is soft at room temperature. 8) Potassium in water Potassium is a highly reactive metal. Liquid ammonia, if exposed to alkali metal, reacts with electrons much slower than water, forming a dark blue solution of solvated electrons. The reaction of potassium and water is more vigorous than sodium’s: fizzing (hydrogen gas is released) potassium floats and moves around on the water; catches fire with a LILAC flame; potassium disappears; When the group 1 metals react with air they oxidise, showing a similar trend in reactivity as we go down the group of the Periodic Table. Early in the reaction, the potassium becomes so hot that it catches fire and burns with a characteristic pale lilac colour. They are stored in oil to stop air and water vapour coming into contact with them. It is white with a silvery shine or luster. Conclusion: wear safety equipment and stand well back! There are three reactions involved in the deployment of an air bag. In air: 4Li (s) + O 2 (g) → 2Li 2 O (s) Sodium and potassium produce a mixture of oxides, peroxides and super-oxides.
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