Question

water can react with hydrogen ion to make the oxonium ion H3O+ .what is present in H2O molecule that allows it to react with hydrogen ion .describe the bonding in the oxonium ion,

Answer 1

there are 2 lone pairs but only one of them makes a cordinate bond with an empty 1  s-orbital on a Hydrogen atom .
then there are 3 bonds in H3O + ion all the three are identical but 2 of them are covalent and 1 coordinate.