Double Replacement Reactions Lab Report

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Single Replacement Reactions and Double Replacement Reactions

A chemical reaction is a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction. The evolution of energy as heat and light, production of gas, formation of a precipitate, and color change are 4 indicators of a chemical reaction. Two out of the six types of reactions are the single and the double replacement reactions. During single replacement, one element replaces another element in a compound. There are two different possibilities: In one, a cation replaces another; represented by this equation: AX + Y ---> YX + A. The second is when an anion replaces another; written using generic symbols, the equation is A + XY ---> XA
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Lowry independently expanded the Arrhenius acid definition into one of his own. The Bronsted-Lowry acid is a molecule or ion that is a proton donor. Lewis's definition emphasizes the role of electron pairs in acid-base reactions. A Lewis acid is an atom, ion or molecule that accepts an electron pair to form a covalent that accepts an electron pair to form a covalent bond. Each theory agrees that an acid is a substance that is dissolved in water and is separated. Although Arrhenius' and Lowry's theory separates them into individual ions, Lewis forms them into covalent bonds. The Arrhenius theory opposes the Lowry theory because it is linked to pH and the other is not. The Bronsted-Lowry theory is different from the Arrhenius and Lewis theories by the conjugate acids-bases. Although all Bronsted-Lowry acids and bases are the same as the Lewis acids and bases, in a Lewis theory, anytime you make a covalent bond, each atom always shares one electrons.All the theories deal with covalent

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