![]() ![]() ![]() The criss-cross method can be used to find the chemical formula for magnesium hydroxide. The number of atoms of each element present in one molecule of a substance is represented by its chemical formula. Derivation of the Magnesium Hydroxide Formula Magnesium hydroxide is found in nature as the mineral brucite, which is a major source of Mg(OH) 2 for a variety of uses. The compound is ionic, consisting primarily of the ions Mg2+ and OH. The centre Mg is linked to the two hydroxyl groups in the chemical structure depicted below. Magnesium hydroxide has the chemical formula Mg(OH) 2 and a molar mass of 58.32 g/mol. Milk of magnesia, a typical antacid, is made from its aqueous solution. Magnesium hydroxide is an inorganic base that is non-toxic. Calcinating lamellar hydroxide yielded polyhedral nanoparticles of 3070 nm magnesium oxide. Magnesium oxide calcined from generated magnesium hydroxide was also studied for particle shape and size. The best lamellar magnesium hydroxide particles in terms of size and homogeneity were 50–80 nm in length and 10 nm in thickness. As the flow rate increased, the particle size of magnesium hydroxide increased as well,but stayed relatively constant as the reactant concentration changed. The impacts of several operating variables on the size of magnesium hydroxide nanoparticles were explored,including rotation speed,reactant concentration, and liquid flow rate of the reactants. Magnesium hydroxide was made by constantly pumping two aqueous solutions of MgCl 2 and NaOH into the reactor chamber, where they reacted to generate Mg(OH) 2.
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