Magnesium hydroxide flame

(1) ① magnesium hydroxide is decomposed by heat to produce water vapor, which can isolate oxygen and prevent the generation of flame and smoke; ② The generated magnesium oxide is a high-temperature resistant material, which can also isolate the contact between combustibles and oxygen and prevent the further spread of flames.
(2) ③ study the properties of magnesium hydroxide ④ solid insoluble
⑤ The solid is dissolved ⑥ Mg (OH) 2 MgO + H 2 O
⑦Mg(OH) 2 +2HCl==MgCl 2 +2H 2 O
⑧ Magnesium hydroxide can react with acid
⑨ Adjust the test tube port in Experiment II device to slightly downward.