For a bread/cake already baked, dip it in vinegar.
You can substitute baking powder for baking soda in a recipe, but the amount needed may vary.
Your question cannot be answered because you didn't say what you want to use baking soda in or for.
Baking soda will cause things to rise also. Muffins are smaller so there is not as much need for lift. Baking powder will give more rise than soda. Whoever created the recipe chose to use soda instead of baking powder.
You can use whipped egg whites as a substitute for both baking powder and baking soda in a recipe.
To substitute baking soda for baking powder in a recipe, use 1/4 teaspoon of baking soda for every 1 teaspoon of baking powder called for in the recipe. Additionally, you may need to add an acidic ingredient like lemon juice or vinegar to help activate the baking soda.
The recipe that I use calls for baking soda.
Yes, you can substitute baking soda for baking powder in a recipe, but you will need to adjust the amount used. Baking soda is about four times stronger than baking powder, so you will need to use less of it.
It depends on what the recipe is
To replace for example 3 teaspoons of baking powder with baking soda, mix 1 teaspoon of baking soda with 2 teaspoons of cream of tartar.
Baking powder is a mixture of baking soda, starch and an acid (often tartar) to activate the baking soda. Since baking soda is already in the baking powder, it is possible you will not need any additional baking soda. Baking powder and baking soda are used to "raise" or puff up the pastry - too little and it will not raise properly...too much and it will taste like soda. If you do not have a specific recipe, you will need to experiment.
You can use baking powder as a substitute for bicarbonate of soda in the recipe.
To test the effectiveness of baking soda in a recipe, you can conduct a simple experiment by preparing two batches of the same recipe - one with the recommended amount of baking soda and one without. Compare the texture, rise, and taste of the two batches to see if the baking soda made a difference in the final outcome.