Is there a chemical reaction when lemon juice heats?, is it ok for cooking?
464802
The juices contain compounds that are easily oxidized; that's how kids can make "invisible ink" on paper with lemon juice, for example (in other words, when the juice is exposed to the air, it speeds up the oxidation process and the result is that the juice becomes darker in color then it was at the starting point).  It's perfectly safe to cook with and heat them in recipes.  Both tend to dissipate as they are heated and cooked, so typically add them at the end of the cooking process to keep their flavors "zingy" in the dish you are preparing.
665469
Use honey and drink pure lemon juice.
188548
Because of the chemical composition in them? May be lemon or orange? they contain more acid.
568686
Because it's an unstable compound, it breaks down over time as it's exposed to heat and air. This is a big problem with most fruit juices since they tend to be concentrated by boiling before being shipped, then reconstitued with water before being sold. An awful lot of fruit juice manufacturers actually add Vitamin C to their products to match up with people's idea that all fruit has vitamin C in it.
753808
Do demonstrate the electric current produced by the acids reacting with the probes.  Your lemon is really a battery.
164243
1 tbsp baking soda and 1/2 tsp lemon juice this will whiten and does not have the explosive properties of baking soda and hydrogen peroxide
316937
Try some tea with lemon
776362
I believe the oil will burn before it boils.  I wouldn't try it.   Because nothing is quite so entertaining as a pot of boiling flaming olive oil!
1114242
Sure, a stainless-steel tank would work.  You just need to make sure that the citrus oil is very pure (doesn't contain a lot of citric or ascorbic acid from the fruit itself), because even though it's called stainless steel, that doesn't mean it can't corrode when attacked by acids.  Even if it does oxidize the metal a little bit, it probably won't affect the contents any; it'll just discolor the inside of the tank.
830944
Some doctors believe cooking with aluminum pots causes alzheimers disease, so please consider using cast iron or steel. \n Aluminum is still ok according to the doctors for such things as boiling eggs and heating water, but you should never use it for acidic foods like tomato sauces and fruits.\n  As for the pan you burned, just clean it and it will be fine.
795786
It really is dependent upon the enzyme and where it is. You can cook vegetables at high temperatures and not destroy everything. But as a rule if you boil any vitamin then it isn't going to last!
607735
If heat has been added to an element, it may make a chemical reaction.  If some object's physical properties due to heat or cooling, a chemical reaction may have occurred.  For example, a fire burning wood creates a chemical reaction in the wood.
933765
Lemon juice is the only one that is significantly acid, so it will have the lowest pH.
511699
Yes, lemon juice and vinegar will cause iron to rust as well. It's like that old story where they say that putting a tooth in a can of coke for a day will cause the tooth to dissolve, yes it will, but the same could be said for putting a tooth in a glass of orange juice for a day as well. It's the acid in coke that causes the effects you're talking about, an Orange and Lemon juice and Vinegar all have more acid in them than coke does.
84313
Yes, it is good advice.  You want the soup to simmer gently, not boil furiously. The flavors will blend better.  You won't be in danger of the pot boiling over on the stove and making a mess.  And your soup won't burn. \n\nGood luck with your soup!  Bon appetit!
823021
Don't over cook it .... .
691769
Yes, it erodes tooth enamel. (usually citrus fruit)\nSaliva usually neutralizes the acid. So just don't over do the fruit juices.  Also don't brush your teeth right after you have orange juice or any acidic fruit!\nThe enamel is softened by the acid and you can cause more damage with a tooth brush. Just rinse your mouth with water if your worried about it. Wait about 1/2 an hour or longer before you brush.