What happens when Sodium Hydrogen Carbonate reacts with lemon juice?
a ) Sodium Acetate and water are produced
b ) Sodium Citrate and oxygen are produced
c ) Sodium Citrate , carbon dioxide and water are produced
d None of these
Answers
Answer:
The sodium bicarbonate of the baking soda reacts with the citric acid in lemon juice to form carbon dioxide gas. The gas bubbles are trapped by the dishwashing soap, forming fizzy bubbles.
Explanation:
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Answer:
One thing to notice is that your main carbon molecule (citric acid) never gains an oxygen while your bicarbonate magically loses one on its way to CO2. This doesn't happen. Indeed it is probable that water is formed because you are forming CO2 from the bicarbonate by losing a proton and an oxygen.You'd have to check the mechanism on that one. If I were doing this problem I'd say though that the bicarbonate attacks the citric acid on one of the carbonyl bonds to form a dihydroxy intermediate that then evolves CO2. One of the hydroxyls then would be protonated by acid lying around in solution and the carbonyl oxygen would kick off the water molecule. This would happen on all three carboxylic acid groups on the CA thus 3 H20 would be formed. Just a guess though, I'm not sure what you're products are but just going off gen/org chem knowledge I'd say:
C6H807 + 3NaHCO3 -> 3CO2 + 3H20 + 3Na(+1) + C6H8O7(3-)
Review the acid-catalyzed esterification mechanism in your ochem text. Instead of a carboxy acid and an alcohol just pretend the alcohol is bicarbonate (HO-R' = HO-CO2). Also, instead of going all the way through with the reaction, just stop at the part where the carbonyl oxygen has a negative charge on it and that's where the ionic bond from sodium will form.