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Yes, baking powder reacts with lemon juice. It is similar to baking soda and viniegar. Baing soda is a base, and lemon juice is acidic. When mixed, CO2 is created.
It will be shinny if you leave it in there for 5-10 minutes
IT would react faster in lemon juice because it is acidic and milk has no chemicals in it that make it acidic, and is classified as basic...
You can dye your hair blonde naturally by applying lemon juice to your hair and sitting in the sun. The acidic lemon juice will react with the heat and light from the sun to naturally lighten your hair.
It's a chemical change because the lemon and water cannot be separated by physical means. If it were a physical change, then the lemons and water would not be dissolved.
Laundry detergent is an alkaline substance and will not react with the layer of patina on the pennies, it will however clean of any fatty dirt on the pennies.The acid in the lemon juice will immediately dissolve the thin patina,Read more: Which_cleans_pennies_better_laundry_detergent_or_lemon_juice
It really all depends on the recipe. In, say a cake batter, the addition of lemon juice instead of rind is perfectly ok as an approximate (though the fragrance and distribution of flavour isn't quite the same). You should be careful in recipes and take into account the high acidity in lemon juice and how it will react chemically with other ingredients. It may cause cream sauces to curdle, for example.
Lemon juice contain organic acids as citric acid etc; citric acid react with sodium carbonate and sodium citrate is formed.
I have always been told by squeezing a lemon over your head and going out in the sun :D It doesn't always work, but watch your hair as you will need to make sure it doesn't react to the lemon juice and also depending on the lemon juice trails in your hair you may get a highlighted affect in streaks.
The acid (C6H8O6) reacts with baking soda (NaHCO3) to form sodium salt of acid (C6H7O6Na), water and carbon dioxide.