hydrogen ions playaa.
********************2nd Opinion******************
Nope, hydroxide ion.
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Hydroxide ion (OH-) is commonly found in the formula of a base, where it reacts with acids to form water and a salt. Bases are substances that release hydroxide ions in solution to accept protons.
The conjugate base of HF is the fluoride ion F-
The formula for a base using nickel(II) ion is Ni(OH)2. This compound forms when nickel(II) ion (Ni^2+) reacts with hydroxide ion (OH^-) in a 1:2 ratio to produce the basic compound nickel hydroxide.
Ammonia is a weak base. It can accept a proton (H+) from water to form ammonium ion (NH4+) and hydroxide ion (OH-).
The conjugate base of HClO2 is ClO2-, which is derived by removing a proton (H+) from HClO2, resulting in the chloride ion (Cl-) and leaving behind the chlorite ion (ClO2-).
The chemical formula of a sodium ion is Na+, while the chemical formula of a fluoride ion is F-.