It is a white solid ionic compound consisting of sodium cations Na + and hydroxide anions OH −. The following series of videos shows the reaction of sodium with water. One of the most characteristic properties of the alkali elements is that they are very reducing, with less than - 2.0 electrochemical potential v. They are so reactive that they should be retained in light petroleum to prevent contact with water, which react with different violence. During the reaction, the sodium metal may well become so hot that it catches fire and burns with a characteristic orange colour. Sodium is by far the most commercially important alkali metal. Make Money Automatically with the Auto Profit Machine; Make Money Automatically with the Auto Profit Machine While sodium carries an atomic number of 11, it is soft, and has a light silver-white colour. Elemental sodium is an odorless silver-white metal solid that reacts violently with water, acids and oxygenated compounds. This is an exothermic reaction. sodium metal, Na (s), and water, H2O (l) Second you have to determine what kind of reaction this is: this is a single displacement reaction, an element replaces another, sodium replaces hydrogen. During the reaction, the sodium metal may well become so hot that it catches fire and burns with a characteristic orange colour. Instead, sodium is always found as a salt. As the sixth most abundant element in the Earth's crust, sodium compounds are commonly found dissolved in the oceans, in minerals, and even in our bodies. This reaction produces hydrogen, OH­ (whose formation is made clear with the shift of the different indicators: fenophtalein, methyl red and Thymol blue) and enough heat to melt the metal (melting point = 98 ° C) which slides over the surface of the water as a blood cell that is consumed quickly, according to the reaction: Universidad de AlicanteCarretera de San Vicente del Raspeig s/n03690 San Vicente del RaspeigAlicante (Spain), For further information: informacio@ua.es, and for enquiries on this web server: webmaster@ua.es, Carretera San Vicente del Raspeig s/n - 03690 San Vicente del Raspeig - Alicante - Tel. 2N a(s)+2H 2 O(l)→ 2N aOH (aq)+H 2 (ii) sodium metal is heated in free supply of air to form sodium peroxide and sodium oxide. Science defines sodium as a chemical element that can be represented with the symbol Na; its Latin name is natrium, hence the symbol. (iii) When sodium peroxides are dissolved in water hydrogen peroxides are formed along with the sodium hydroxide. Third you determine the products: Required fields are marked *, What Happens When I Sodium Metal Is Dropped In Water Ii Sodium Metal Is Heated In Free Supply Of Air Iii Sodium Peroxide Dissolves In Water. It occurs abundantly in nature in compounds, especially common salt —sodium chloride (NaCl)—which forms the mineral halite and constitutes about 80 percent of the dissolved constituents of seawater. Lighter than water, sodium can be cut with a knife at room temperature but is brittle at low temperatures. The reaction with heavier elements is extremely violent producing explosions due to contact of hydrogen with oxygen from the air. Solution: Let us first write down the chemical formulas. One of the most characteristic properties of the alkali elements is that they are very reducing, with less than - 2.0 electrochemical potential v. 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The reaction is exothermic. Sodium, an alkali-metal element, has a strong tendency to exist in the ionic form. (i) Sodium (Na) is metal which is extremely reactive which reacts with water and produces hydrogen gas. Sodium metal is one of the alkali metals which are soft and reactive and have relatively low melting points. Science defines sodium as a chemical element that can be represented with the symbol Na; its Latin name is natrium, hence the symbol. The violence of the reaction of alkali metals with water does not correspond with the potential to electrochemical element of the group, producing the Li, which has the most negative potential of the periodic table, the slower reaction. Sodium Metal: Facts, Dangers And Safety Precautions. So, you need something called Activity Series. Since it's so reactive, sodium is never found in free form in nature. The reaction is exothermic. Sodium is essential to all animals, but only to a few plants. Your email address will not be published. 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