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I'm not sure. Probably not, i know that you can use cream of tartar though.
Baking Soda
No. Alum is an acid and crisping agent, baking soda is an alkaline salt.
A substitute that I have seen for in making crystals is alum. It seems to be a great way to grow them.
Yes. Baking soda will work as a substitute in this case.
I have been informed that baking powder is 1/4 baking soda & 5/8 cream of tartar the rest being made up of various other ingredients. Baking soda by itself is no good as it is alkaline and you need an acid so, depending on the recipe, you could try lemon juice, white vinegar or buttermilk.
I have been told a substitute is a grape leaf. I am going to try it when I make my Kosher Dill Pickles.
The ingredient in baking soda that causes baked goods to rise in the oven is sodium bicarbonate and alum or cream of tartar. Both alum and cream of tartar are acidic. Cream of tartar is used for alum free powders. Sodium bicarbonate is slightly basic. The reaction between the two chemicals when moistened and heated produces carbon dioxide gas which causes the cake to rise as the bubbles of CO2 gas get trapped in the cake.
Yes. If you have alum, cream of tartar or vinegar you can use soda instead of powder. For alum substitute 2 1/2 tsp soda and 1/2 tsp alum for 1 tbs powder. For cream of tartar substitute 2 tsp soda and 1 tsp tartar for 1 tbs powder. mix the above together. For vinegar put 2 1/2 tsp soda in for the powder, add 1 tsp vinegar with the liquids in the recipe for 1 tbs powder. Note: baking powder is baking soda mixed with a dry acid that is activated when moistened and heated.
Commercially made "Playdoh" can be substituted with home made play dough. One needs to be careful to use a recipe that will not mold or spoil. Some formulas include alum or other unpleasant flavoring to discourage children from eating the dough. Hear is one link to a basic play dough recipe: http://www.amazingmoms.com/htm/artclayrecipes.htm
The address of the Alum Creek is: Fuquay Creek, Alum Creek, 25003 0530
non ferric alum is the purer form of alum as compared to Ferric alum. Non ferric alum is used in pulp and paper industry while ferric alum is used in water treatment plants.