This is due to the fact that it is a relativly strong acid, just like a lemon is.
how can you tell that vinegar is sour
Vinegar has a sour taste. (Think pickles)
vinegar is sour because it contains acetic acid acids are sour to the taste
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sour,acidic
sour,acidic
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VINEGAR
Vinegar
Either you're talking about *sour* or sore.. Sour is something opposite of sweet. Vinegar is sour. A sore is a wound, an injury.
Apple vinegar may be eaten, but it is awfully sour.