How many hydrogen atoms does this compound contain?
I get 7… where did I go wrong?
there should be 6
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The acetoacetic acid is CH3–CO–CH2–COOH, which is 6 H atoms. Organic compounds consisting only of C,H,O always contain an even number of H atoms.
As it is drawn, 8
You don’t have to record these blue stitches. Chemists like it simpler, as in Figure 1
Your mistake could be that you only counted the blue lines. The H at “COOH” also belongs to it. As they come to six, I’d rather ask myself.
The two blue lines on the right of the carbon of the COOH group do not belong there
You’re right! How easy you can look at this…
Thanks for the correction
Yes, it’s 6
No further bonds are added to the COOH.
But I thought the C inside the acid soup would just be connected to the O?
Theoretically there are “hydroperoxides” e.g. H3COOH, in which the two O atoms hang in a chain. But hopefully they won’t appear anywhere (and if not: keep ears and run away). In the carboxyl group, both os are connected to the C (one simple, that carries one H, the other double), so there is no further H.
The C has a double bond with an O and a single bond with OH.
The acid group has only the H shown.