Characterize barium hydroxide using various base classification criteria.

Barium hydroxide, formula Ba (OH) 2 is a white, odorless substance. It dissolves in water, forming a strongly alkaline solution. It does not dissolve in ethyl alcohol and is toxic.

Main characteristics of barium hydroxide:
Molecular formula – 171 g / mol
Density – 4.5 g / cm3
Melting point – 408 oС
Boiling point – 780 oС
Decomposition temperature – 1000 oС
Solubility in water (20 oС) – 3.89 g / 100 ml

Barium hydroxide chemical properties:
Barium hydroxide is a strong base that reacts with:
acidic oxides to form salt and water:
Ba (OH) 2 + CO2 = BaCO3 ↓ + H2O
acids with the formation of salt and water (neutralization reaction)
Ba (OH) 2 + 2HCl = BaCl2 + 2H2O
Ba (OH) 2 + H2SO4 (conc) = BaSO4 ↓ + 2H2O

salts
Ba (OH) 2 + K2CrO4 = BaCrO4 ↓ + 2KOH
Ba (OH) 2 + MnS2O6 = BaS2O6 + Mn (OH) 2 ↓
Ba (OH) 2 + 2NH4ClO3 (conc.) = Ba (ClO3) 2 + 2NH3 ↑ + H2O

When barium hydroxide is heated to a temperature of 780 – 800 ° C, it decomposes into barium oxide and water:
Ba (OH) 2 = BaO + H2O