Jan was told by her mother to clean a kettle which had a heavy deposit of limescale. Her friends suggested the following products that could be used to achieve this: Zippo, Wham Bam, Scale Away and Blorox. Jan found that Scale Away successfully removed the limescale deposit while the others did not. Propose a hypothesis to explain the above observation?

what happened when they removed the limescale?

Explanation:

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.