Suppose you encounter a chemical formula with h as the cation. what do you know about this compound immediately?

By finding a chemical formula with H as a cation (positively charged ion), you can immediately know that the compound is an acid.

Explanation:

By finding a chemical formula with H as a cation (positively charged ion), you can immediately know that the compound is an acid.

According to the Arrhenius Acid-Base Theory, acids are those substances that dissolved in water divide by generating H⁺ together with an anion (ion with a negative charge). In an aqueous solution, the H⁺ protons react immediately with the water molecules to form H₃O⁺ hydronium ions.

According to this theory, those acids that dissociate completely are strong acids (releasing all protons H⁺), while acids that do not dissociate completely are weak acids (the percentage of dissociation is not 100%, releasing few protons H⁺)

An example is:

HCl + H₂O ⇒ Cl⁻ + H₃O⁺

This is an example of a strong acid.

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8