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#MOLAR MASS OF ACETIC ACID HOW TO#

All buret readings should be to the nearest 0.01 mL. Determine the average molarity of acetic acid in your unknown vinegar sample. will be similar to that in the previous titration. A pH testing strip will tell you that NaOH (sodium hydroxide) is a strong alkaline, but to calculate its exact pH, you have to work out its molarity first. In mathematical terms, pH is the negative logarithm of the molar concentration of hydrogen ions in the solution. ( 0.91 M CH 3 COO H + 0.89 M CH 3 COO H) / 2 = 0.90 M CH 3 COOH Knowing the moles of acetic acid allows for the grams of acetic acid per 10 mL of vinegar to be calculated.Ī pH lower than 7 is acidic, while a pH higher than 7 is alkaline.

Both values of the acetic acid's molarity are added and then divided by two to get the average molarity.

The percent acidity (percent acetic acid) in a. Vinegar is regulated by the Food and Drug Administration (FDA) and to be legal must have a minimum of 5% acidity. Acetic acid (ethanoic acid) is an organic acid (carboxylic acid) and is classified as a weak acid.

what does return item chargeback mean on a checkĪcetic acid (CH 3 COOH or HC 2 H 3 O 2) is the source of the acidity in vinegar.

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#MOLAR MASS OF ACETIC ACID HOW TO#

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