The bond angle of a water molecule H2O according to the VSEPR Valence Shell Electron Pair Repulsion theory is approximately 104.5 degrees. This theory states that the electron pairs around a central atom will arrange themselves in a way that minimizes the repulsion between them. In the case of water, there are two bonding pairs between the oxygen and hydrogen atoms and two lone pairs of electrons on the oxygen atom.The bond angle of 104.5 degrees in water is smaller than the typical tetrahedral angle of 109.5 degrees because the lone pairs of electrons on the oxygen atom repel the bonding pairs more strongly, pushing the hydrogen atoms closer together. This leads to a bent molecular geometry.This bent structure and the presence of lone pairs of electrons on the oxygen atom give water its unique properties, such as:1. Polarity: The bent structure and the difference in electronegativity between oxygen and hydrogen atoms create an electric dipole moment, making water a polar molecule. This polarity allows water to dissolve many substances and form hydrogen bonds with other molecules.2. High boiling and melting points: The hydrogen bonding between water molecules results in a strong intermolecular force, which requires more energy to break. This leads to water having relatively high boiling and melting points compared to other molecules of similar size and weight.3. High heat capacity: The hydrogen bonding between water molecules also allows it to absorb and release a large amount of heat without undergoing significant temperature changes. This high heat capacity is essential for maintaining stable temperatures in living organisms and the environment.4. Surface tension and cohesion: The polarity and hydrogen bonding between water molecules create strong cohesive forces, leading to high surface tension. This property allows water to form droplets and enables capillary action, which is crucial for the transport of water in plants.Overall, the bond angle of 104.5 degrees in water, as predicted by the VSEPR theory, plays a significant role in determining the molecule's structure and its unique properties.