Final answer:
The hydronium ion, H3O+, forms when acids are dissolved in water. It is made when a water molecule accepts a hydrogen ion. The formula for the hydronium ion is H3O+.
Step-by-step explanation:
The hydronium ion, H3O+, forms when acids are dissolved in water. It is made when a water molecule accepts a hydrogen ion, resulting in a positively charged hydronium ion.
The formula for the hydronium ion is H3O+, which represents one oxygen atom bonded to three hydrogen atoms.
The hydronium ion has a trigonal pyramidal geometry, with a lone pair of electrons on the oxygen atom, giving it a bond angle of 113 degrees.