OCR A2 CHEMISTRY F324 and F325- 14th and 22nd June 2016- OFFICIAL THREAD

I think it'd be 1 for the COOH, and another for the correct double bond, then perhaps they'll limit you to one if you didn't draw it skeletally.

For the first question it was the THIRD fatty acid. The question asked which is 'most LIKELY' to cause heart disease. The third fatty acid is most LIKELY to have at least one trans bond, and therefore most likely to be a trans fatty acid. It is TRANS FATTY ACIDS that act like SATURATED FATS. Key point to note here is there is a difference between TRANS FATS and TRANS FATTY ACIDS.

Ah, I drew it skeletally ( interchangable too) but just forgot the COOH, everything was correct apart from the damn COOH lol

Idk man... how many marks was it? 2 right?

Idk man... how many marks was it? 2 right?

1 /5char

The stearic acid was a saturated fatty acid so it is more unhealthy.

For the first question it was the THIRD fatty acid. The question asked which is 'most LIKELY' to cause heart disease. The third fatty acid is most LIKELY to have at least one trans bond, and therefore most likely to be a trans fatty acid. It is TRANS FATTY ACIDS that act like SATURATED FATS. Key point to note here is there is a difference between TRANS FATS and TRANS FATTY ACIDS.

but the first acid was saturated so surely that would be the most likely

but the first acid was saturated so surely that would be the most likely

Re-read what I wrote, but pay particular attention to the fact that saturated fats(which are bad) and saturated fatty acids are different.

For the first question it was the THIRD fatty acid. The question asked which is 'most LIKELY' to cause heart disease. The third fatty acid is most LIKELY to have at least one trans bond, and therefore most likely to be a trans fatty acid. It is TRANS FATTY ACIDS that act like SATURATED FATS. Key point to note here is there is a difference between TRANS FATS and TRANS FATTY ACIDS.