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Acid-Base Titration
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| Submitted: Wed Oct 13 2004
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Juliana LONDOŅO 23-09-04 1°IB Chemistry Lab Report Acid-Base Titration Introduction: An acid is defined as a proton (H+) donor, and a base as a proton (H+) acceptor. The acid used in this experiment, dilute hydrochloric acid, is a good proton donor while sodium hydroxide, also employed in this experiment and a strong alkali, contains the hydroxide ion (OH-) which is a strong proton acceptor. The alkali which produces this OH- ion will neutralize acids by this reaction: H+(aq) + OH- (aq) --> H2O (l) This reaction is common to all neutralization reactions between acids and alkalis in aqueous solution. It should be noted that in aqueous solutions the H+ ions exist in their hydrated forms H+ (aq). The aim of this experiment is to calculate how many hydrochloric acid moles do we need in order to neutralize a solution made of sodium hydroxide and phenolphthalein (an indicator). The endpoint of this reaction is determined when the color changes pink...
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