i personly dont think it has a solubility
No, it will dissolved into water and other liquids/oils. But it is an anhydrous powder, making it difficult to dissolve, but it will.
It will overflow because the baking powder isn't soluble, DO NOT TY IT!!
Yes, because it is a Sodium salt, all of those are soluble!
baking powder is an insoluble solid and sugar is soluble solid!!!!!!!!!!!!!!!
Yes it will because of the minute particles inside baking powder
if you use old baking powder, the cake will not rise properly. To test the baking powder to see if its still good, put one teaspoon of baking powder in a glass, add a little water, if it foams real good, you can use it, otherwise throw it out and get new.
A substance that dissolves readily in water is called "water soluble"
Baking Powder
Baking powder in a recipe helps your item rise when baking.
baking powerder is baking powder is not the same!
baking powder
Baking soda does not rise as well as baking powder
baking powder is neutral