Question

Viết PTHH sau ( ghi rõ điều kiện nếu có )

a) Al + O₂

b) S + O₂

c) Na + H₂O

d) C₄H₁₀ + O₂

e) Fe + H₂SO₄

g) P₂O₅ + H₂O

Answer 1

a) \(4Al+3O_2\rightarrow2Al_2O_3\)

b) \(S+O_2\rightarrow SO_2\)

c) \(2Na+2H_2O\rightarrow2NaOH+H_2\uparrow\)

d) \(2C_4H_{10}+13O_2\rightarrow10H_2O+8CO_2\)

e) \(Fe+H_2SO_4\rightarrow FeSO_4+H_2\uparrow\)

g) \(P_2O_5+3H_2O\rightarrow2H_3PO_4\)

Answer 2

a, \(4Al+3O_2\underrightarrow{t^o}2Al_2O_3\)

b, \(2S+3O_2\underrightarrow{t^o}2SO_3\)

c, \(2Na+2H_2O\rightarrow2NaOH+H_2\)

d, \(C_4H_{10}+\dfrac{13}{2}O_2\underrightarrow{t^o}5H_2O+4CO_2\)

e, \(2Fe+6H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+6H_2O+3SO_2\)

g, \(P_2O_5+3H_2O\rightarrow2H_3PO_4\)

Answer 3

a) 4Al + 3O₂ \(\underrightarrow{to}\) 2Al₂O₃

b) S + O₂ \(\underrightarrow{to}\) SO₂

c) 2Na + 2H₂O → 2NaOH + H₂

d) C₄H₁₀ + \(\dfrac{13}{2}\)O₂ \(\underrightarrow{to}\) 4CO₂ + 5H₂O

e) Fe + H₂SO₄ → FeSO₄ + H₂

g) P₂O₅ + 3H₂O → 2H₃PO₄

Answer 4

\(4Al+3O_2\underrightarrow{t^o}2Al_2O_3\)

\(S+O_2\underrightarrow{t^o}SO_2\)

\(2Na+2H_2O\rightarrow H_2+2NaOH\)

Answer 5

a) 4Al + 3O₂ 2Al₂O₃

b) S + O₂ \(\underrightarrow{to}\) SO₂

c) 2Na + 2H₂O → 2NaOH + H₂\(\uparrow\)

d) C₄H₁₀ + \(\dfrac{13}{2}\)O2 \(\underrightarrow{to}\) 4CO₂\(\uparrow\) + 5H₂O

e) Fe + H₂SO₄ → FeSO₄ + H₂\(\uparrow\)

g) P₂O₅ + 3H₂O → 2H₃PO₄