This task was created to demonstrate the barium oxide chemical properties.
The student is asked to determine the type of BaO relying on the observations they've seen. The correctness of the student's conclusion is checked by the system.
equipment: spawners, destroyer, tablet
glassware and items: erlenmeyer flask 250 ml, pestle, mortar, spatula
solutions and liquids: NaOH 1M, HCl 1M, H₂O, Ca(OH)₂ 0.01M, HNO₃ 2M
solids: BaO, MnO₂, CrO₃, CuO, MnO, NaCl
indicators: phenolphthalein, methyl orange, litmus
checking area labels (from left to right): "neutral oxide", "amphoteric oxide", "basic oxide", "acidic oxide"