2.The same happens when you put coffee granules or powder into hot water. The coffee granules are made from particles of a substance which is brown. When coffee dissolves it does not stop being brown. As a result, unlike sugar, which is transparent, the coffee particles make the water brown.
The reaction is: Sodium bicarbonate and acetic acid reacts to carbon dioxide, water and sodium acetate. The solid baking soda was placed in liquid vinegar producing carbon dioxide gas, which is evident because of the formation of bubbles in the foaming mixture.
When vinegar and baking soda are first mixed together, hydrogen ions in the vinegar react with the sodium and bicarbonate ions in the baking soda. The result of this initial reaction is two new chemicals: carbonic acid and sodium acetate. The second reaction is a decomposition reaction.
The combination of salt and vinegar creates sodium acetate and hydrogen chloride. This chemical reaction will take an old penny and shine it like new. Mix a 1/4 cup of white vinegar and one teaspoon of salt in a non-metalic bowl.13 Mar 2018
