View HintsGlacial acetic acid is the 100 % acetic acid obtained by first freezing pure ethanoic acid to get glacier like structure then it is melt to get obtain the glacial acetic acid. Due to the formation of calcium stearate and magnesium stearate with hard water most of the soap is wasted in the production of these precipitates that is why it is unadvisable to use soap with hard water. Acetic acid is the other name for ethanoic acid . Water is hard due to the presence of calcium and magnesium ions. Water loving part of soaps and detergents is called hydrophilic and the dirt loving part is called hydrophobic part. Ethanoic acid also undergoes neutralization reaction in the same manner as that of any other acid. All the carboxylic acids react with sodium carbonate and sodium hydrogen carbonate to give CO2 gas as one of its products which can be further tested by passing the produced gas through lime water if it turns lime water milky it shows the presence of carboxylic acid or else it is not the case. When an ester is heated with dilute sodium hydroxide it changes back into the original alcohol and sodium salt of the original carboxylic acid . Such reaction is known as saponification. Saponificarion is the reaction reverse to that of esterification. Hard water doesnt produce that much of lather with soap as hard water reacts with soap to form curdy white precipitate. |
