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First of all to correct your formula mistake. It is Ba(OH)2, which is barium hydroxide. There is no such molecule as BaOH2. This incorrectly shows one barium , ONE oxygen and two hydrogens. The correct formula , with brackets, indicates that there are two oxygens and two hydrogens.

Secondly. Barium hydroxide Ba(OH)2 bonds ionically between the barium cation (Ba^(2+)) and the two hydroxide anions ( (OH)^(-)).

However, within the hydroxide anion, the oxygen and the hydrogen bond covalently. as ' O-H^(-) ', with a 'spare' electron for ionic bonding.

Thirdly to correct your 'ionic/molecular'. ALL molecules can be bonded by either Covalent bond or Ionic Bonding.

So Barium hydroxide (Ba(OH)2) is normally deemed to be an Ionic Molecule.

NB By comparison, Water (H2O) and Carbon Dioxide (CO2) are covalently bonded molecules.

NNB The word ' molecule' is a collective noun for all polyatomic substances irrespective of there type of bonding.

NNNB Bonding is in the form of IONIC , COVALENT, and not discussed here, METALLIC'.

So please do not refer refer to 'ionic/molecular'. It is ionic or covalent.

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lenpollock

Lvl 17
2w ago

What else can I help you with?