Most likely water and sugar, but any maker of spud-juice will tell you that it will begin to ferment before it molds.
See, citric acid (found in lemons) and sugar are both preservatives.
Because the apple is soft from the lemon juice
Lemon juice contains citric acid, a weak acid, but it will have have very little effect on the apple. but it will not make it rot faster it will make it rot slower
Because a lemon is a citrus and an apple is not.....
you can prevent an apple from browning by adding lemon juice to it
Apple juice will come up better because it is darker than lemon juice
Sprite Milk Orange juice Apple juice Soda Wine Beer (bad for you) and Blackcurrant juice oil lemon juice
Lemon Juice
lemon juice dissolves smarties faster because of the liquids in it
I'm not sure what pH the apple has, but lemon juice has a pH of 2. Hopefully this helps. :)
The lemon juice keeps the apple from oxidizing.
Metal rusts faster in lemon juice than it does in bottled water.
lemons juice works