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Describe the effect of HCl (pH 4) in both the soap and detergent solutions. Include a...

Describe the effect of HCl (pH 4) in both the soap and detergent solutions. Include a chemical equation if a change (precipitate) occured

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Answer #1

When acid is dropped into both soap & detergent solution to reach the pH of 4, precipitate formed for soap solution while no precipitate formed for detergent solution. Oil is emulsified for both soap & detergent solution. Soap is the sodium salts of fatty acid are water soluble when reacted with acid. Detergents are often water soluble on adding acid. so no precipitate formed.

Soap - CH3(CH2)16COONa (aq) + HCl (aq) CH3(CH2)16COOH (aq) + Na+ (aq) + Cl-(aq)

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