Question

Please see this question : Can any one tell me that when hcl is mixed with chalk then why does it form a yellow color ? is it for the reaction of the Sulpher in 0 oxidation state?? Please answer it with a proof of the reaction

Answer 1

Answer:

chalk contains a compound called calcium carbonate (CaCO3), which reacts with vinegar (acetic acid, CH3COOH) to form the gas carbon dioxide (CO2). Some of the mass of the chalk is lost to form this gas, making it smaller.