Hey I'm doing a chem lab on vinegar. I was wondering, if the bottle of vinegar says 5% acidity....what exactly does that mean? I know the acid in vinegar is acetic acid. So does the 5% acidity label on the box mean that 5% of the total mass of the vingegar is acetic acid? Or does it mean that 5% of the total volume is acetic acid? I don't really know =\ Can anyone please help? Basically for my lab I did an experiment to figure out the volume of NaOH i need to neutralize the Vinegar and now I need to figure out which of the two samples of vinegar i tested is the better choice. How would I decide this? I guess i need to figure out the % of acetic acid in the vinegar sample i used but even if i have the percents at the end which one would be the better one? The one closer to 5%?
2007-04-29 07:19:21 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
It says 5% by volume on my bottle.
I did the same lab a few years ago.
From the lab you figured out the number of moles/L needed to neutralize NaOH.
You calculated the percent per volume of CH3COOH (vinegar) you had in your sample.
You probably got a sample which is closest to but under 5%.
I guess the better one would be the sample you used the least amount of in your titration.
2007-04-29 07:39:11 · answer #1 · answered by Anonymous · 0⤊ 0⤋
It is % mass of acetic acid.
2007-04-29 07:24:18 · answer #2 · answered by reb1240 7 · 0⤊ 0⤋
i dont understand your question what makes something better in your mind?
2007-04-29 07:30:55 · answer #3 · answered by ambientdiscord 5 · 0⤊ 0⤋