When soap is dissolved in water, the surface tension decreases. Soap molecules contain both hydrophilic and hydrophobic parts. The hydrophobic tails disrupt the cohesive forces between water molecules at the surface, reducing surface tension.
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When soap is dissolved in water, the surface tension decreases. Soap molecules contain both hydrophilic and hydrophobic parts. The hydrophobic tails disrupt the cohesive forces between water molecules at the surface, reducing surface tension.