What's the Difference Between Baking Powder and Baking Soda?

Powder vs. Soda: an important distinction!

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Sources:
https://news.ncsu.edu/2014/05/baking-soda-powder/
http://www.seriouseats.com/2015/12/cookie-science-baking-powder.html
https://www.acs.org/content/acs/en/education/whatischemistry/landmarks/bakingpowder.html
https://www.britannica.com/science/tartaric-acid
http://www.epicurious.com/ingredients/why-aluminum-free-baking-powder-is-better-article
http://www.ansac.com/products/about-soda-ash/
https://www.google.com/patents/US2532281

Image Sources:
https://commons.wikimedia.org/wiki/File:Fucus_serratus2.jpg
https://commons.wikimedia.org/wiki/File:Salt_shaker_on_white_background.jpg
https://commons.wikimedia.org/wiki/File:Eben_Norton_Horsford.jpg