2Mg + Si = Mg2Si
Mg2Si + 4HCl = 2MgCl2 + SiH4
SiH4 + 2O2 = SiO2 + 2 H2O
SiO2 + 2NaOH = Na2SiO3 + H2O
<span>Ca+<span>2<span>H2IO</span></span> → <span>Ca<span>(OH)</span>2</span>+<span>H2
</span></span><span><span>Ca<span>(OH)</span>2</span>+<span>H2CO3</span> → <span>CaCO3</span> +<span>2<span>H2O
</span></span></span><span><span>CaCO3</span> → <span>CaO</span>+<span>CO2
</span></span><span><span>CaO</span>+<span>2<span>HCl</span></span> → <span>CaCl2</span>+<span>H2O
</span></span><span><span>Na2CO3</span> +<span>CaCl2</span> → <span>2<span>NaCl</span></span>+<span>CaCO<span>3
</span></span></span>
1. Ca---CaO---Ca(OH)₂---CaCl₂
1) 2Ca+ O₂= 2CaO
2) CaO+ H₂O= Ca(OH)₂
3)Ca(OH)₂+ 2HCl= CaCl₂+ 2H₂O
Находим количество атомов в формуле
Na:O = 2,3/23 : 0,8/16 = 0,1 : 0,05 (затем делим на наименьшее) = 2 : 1
Формула оксида Na2O