Write down the molecular reaction equations: 1. Magnesium carbonate → magnesium chloride → magnesium hydroxide

| December 19, 2020 | education

Write down the molecular reaction equations: 1. Magnesium carbonate → magnesium chloride → magnesium hydroxide → magnesium sulfate indicate the signs of the reactions, for the second reaction write down the ionic equations. 2. Aluminum chloride → aluminum hydroxide → aluminum chloride ↓ sodium tetrahydroxoaluminate indicate the signs of reactions, for the first reaction write down the ionic equations

1) MgCO3 + 2HCl = MgCl2 + H2O + CO2
Sign: gas evolution
MgCl2 + 2NaOH = Mg (OH) 2 + 2NaCl
Sign: precipitation
Ionic equation: Mg (2 +) + 2Cl (1 -) + 2Na (1 +) + 2OH (1 -) = Mg (OH) 2 + 2Cl (1 -) + 2Na (1+)
Mg (2 +) + 2OH (1 -) = Mg (OH) 2
Mg (OH) 2 + H2SO4 = MgSO4 + 2H2O
Sign: dissolution of sediment
2) AlCl3 + 3NaOH = Al (OH) 3 + 3NaCl
Al (3 +) + 3Cl (-) + 3Na (+) + 3OH (-) = Al (OH) 3 + 3Na (+) + 3Cl (-)
Al (3 +) + 3OH (-) = Al (OH) 3
Sign: precipitation of a white precipitate
Al (OH) 3 + 3HCl = AlCl3 + 3H2O
Sign: dissolution of sediment
Al (OH) 3 + NaOH = Na [Al (OH) 4]
Sign: dissolution of sediment



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