Chem - Titration

Chem - Titration - Titration Objective To find the...

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Objective: To find the concentration of an unknown HCl solution. Theory: The process of titration involves the determining of an unknown concentration of a solution, by adding another solution of a known concentration, resulting in a chemical reaction. A chemical reaction can be defined as a process in which one or more substances are converted into other substances. A chemical reaction can usually be described with a chemical equation. Specific to this experiment are HCl, otherwise known as hydrochloric acid, and NaOH, also known as sodium hydroxide. The two reactants form a chemical equation. A chemical equation is a representation of a chemical reaction using the chemical formulas of the reactants and products. Both reactants and products can be categorized as aqueous, solid, liquid, or gas. Aqueous means a solution or a certain substance is soluble in water, and dissolved in water. It is represented by the letters “aq.” Solids are usually precipitates that form that are insoluble, represented by the letter “s.” A liquid is known as a substance in a fluid state of matter, and is represented by the letter “l.” Finally, a gas is a state of matter in which a substance takes on no particular shape or form, and is represented by the letter “g.” In this particular experiment, the chemical equation is HCl (aq) + NaOH (aq) → H 2 O (l) + NaCl (aq) . There are four different types of chemical reactions; they are synthesis, decomposition, single-replacement, and double-replacement. A synthesis reaction is a reaction in which two substances combine together to form a different substance. A decomposition reaction is simply the opposite, where a compound is broken down into parts. In a single replacement reaction, one element reacts with a compound and replaces another element in that compound. A double replacement reaction is known as a chemical reaction between two compounds where the positive ion of one compound is exchanged with the positive ion of another compound. In this particular experiment, the reaction can be classified as a double replacement reaction. The titration of HCl occurs because it is a reaction between an acid and a base. An acid is known as a usually soluble substance that contains hydrogen, with a pH of less than 7. The exact opposite of an acid is a base, which contains hydroxide, with a pH of more than 7. When an acid and a base are added together in a chemical reaction, they form water and a salt. This is known as neutralization. In determining a concentration, molarity is used, which is represented by the
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This note was uploaded on 02/25/2012 for the course CHEM 4385 taught by Professor Staff during the Fall '11 term at Texas State.

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Chem - Titration - Titration Objective To find the...

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