Question

Hoàn thành các phương trình phản ứng sau:

a/\(Mg+?\rightarrow MgO\)

b/\(\text{Al}+H_2\text{S}O_4\rightarrow?+H_2\)

c/\(?+O_2\rightarrow P_2O_2\)

d/\(N\text{a}OH+?\rightarrow C\text{A}\left(OH\right)_2+N\text{a}NO_3\)

Answer 1

a) 2Mg + O₂ \(\underrightarrow{to}\) 2MgO

b) 2Al + 3H₂SO₄ → Al₂(SO₄)₃ + 3H₂↑

c) 4P + 5O₂ \(\underrightarrow{to}\) 2P₂O₅

d) 2NaOH + Ca(NO₃)₂ → Ca(OH)₂ + 2NaNO₃

Answer 2

PTHH: a) 2Mg + O₂ \(\underrightarrow{t^o}\) 2MgO
b) 2Al + 3H₂SO₄ \(\rightarrow\) Al₂(SO₄)₃ + 3H₂\(\uparrow\)
c) 4P + 5O₂ \(\underrightarrow{t^o}\) 2P₂O₅
d) 2NaOH + Ca(NO₃)₂ \(\rightarrow\) Ca(OH)₂ + 2NaNO₃

Answer 3

a ; Mg+O=MgO b; Al+H₂SO₄=Al₂(SO₄)₃+H₂ C;4P+5O₂=2P₂O₅ d;2NaOH+CA(NO₃)₂=CA(OH)₂+2NANO₃