<p> Calculations for the Determination of Acetic Acid in Vinegar</p><p>Mass of vinegar used in experiment 9.69 grams</p><p>Balanced equation for the neutralization reaction:</p><p>NaOH + CH3COOH → CH3COONa + H2O</p><p>To calculate the number of grams of acetic acid neutralized by the sodium hydroxide:</p><p>Molarity NaOH (1mole NaOH/1mole CH3COOH)(60g CH3COOH/1mole)(vol. NaOH liters) = g CH3COOH</p><p>.22M NaOH (1mol NaOH/1mol CH3COOH)( 60g CH3COOH/1mole) (0.038L)* = 0.5016g CH3COOH</p><p>*obtained from endpoint of titration</p><p>To calculate the percent of acetic acid in vinegar:</p><p>% acetic acid = (mass of acetic acid/mass of vinegar) x 100</p><p>% acetic acid = (0.5016g CH3COOH / 9.69g vinegar) x 100</p><p>5.17% acetic acid in vinegar</p>
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