\(1)\\ a) 4Na + O_2 \xrightarrow{t^o} 2Na_2O\\ b) Zn + 2HCl \to ZnCl_2 + H_2\\ c) CaO + H_2O \to Ca(OH)_2\\ d) SO_3 + H_2O \to H_2SO_4\\ 2)\\ a) 2Ba + O_2 \xrightarrow{t^o} 2BaO\\ b) CuO + H_2 \xrightarrow{t^o} Cu + H_2O\\ c) K + H_2O \to KOH + \dfrac{1}{2}H_2\\ d) CO_2 + H_2O \to H_2CO_3\)

Bài 2 câu a sửa CaP thành CaO nhé, ghi nhầm..

Cân bằng PTHH:

2O2+3Fe-to>Fe3O4

Fe3O4+4H2-to>3Fe+4H2O

2Fe+3Cl2-to>2Fecl3

Fe+2HCl->Fecl2+H2

\(3Fe+2O_2\rightarrow\left(t^o\right)Fe_3O_4\)

\(Fe_3O_4+4H_2\rightarrow\left(t^o\right)3Fe+4H_2O\)

\(Fe+2HCl\rightarrow FeCl_2+H_2\)

\(a) 2CH_4 \xrightarrow{t^o,lln} C_2H_2 + 3H_2\\ C_2H_2 + H_2 \xrightarrow{t^o,Pd} C_2H_4\\ C_2H_4 + H_2 \xrightarrow{t^o,Ni} C_2H_6\\ C_2H_6 + Cl_2 \xrightarrow{as} C_2H_5Cl + HCl\)

\(b)\\ C_6H_6 + Br_2 \xrightarrow{Fe,t^o}C_6H_5Br + HBr\\ C_6H_5Br + NaOH \to C_6H_5ONa + HBr\\ C_6H_5ONa + CO_2 + H_2O \to C_6H_5OH + NaHCO_3\\ C_6H_5OH + 3Br_2 \to C_6H_2OHBr_3 + 3HBr\)

\(c)\\ CH_4 + Cl_2 \xrightarrow{as} CH_3Cl + HCl \\ CH_3Cl + KOH \to CH_3OH + KCl\\ CH_3OH + CuO \xrightarrow{t^o} HCHO + Cu + H_2O\\ HCHO + \dfrac{1}{2}O_2 \xrightarrow{t^o,xt} HCOOH\)

`1. 4FeS + 11OFeO + 8SO

2. 2Cu(NO) 2CuO + 4NO+ O

3. CH + 2O CO + 2

4. CH + 5O 3CO + 4HO

5. CHO + 3O 2CO + 3HO

Đề yêu cầu cân bằng phương trình nha

@trần hữu tuyển giúp em vs

a: \(SO_3+2NaOH\rightarrow Na_2SO_4+H_2O\)

\(HNO_3+NaOH\rightarrow NaNO_3+H_2O\)

\(CuCl_2+2NaOH\rightarrow Cu\left(OH\right)_2\downarrow+2HCl\)

\(\left(NH_4\right)_2SO_4+2NaOH\rightarrow Na_2SO_4+2H_2O+2NH_3\uparrow\)

b: \(SO_3+Ca\left(OH\right)_2\rightarrow CaSO_4+H_2O\)

\(Ca\left(OH\right)_2+2HNO_3\rightarrow Ca\left(NO_3\right)_2+2H_2O\)

\(Ca\left(OH\right)_2+CuCl_2\rightarrow Cu\left(OH\right)_2\downarrow+CaCl_2\)

\(Ca\left(OH\right)_2+\left(NH_4\right)_2SO_4\rightarrow CaSO_4+2NH_3\uparrow+2H_2O\)

a) \(SO_3+2NaOH\rightarrow Na_2SO_4+H_2O\)

\(HNO_3+NaOH\rightarrow NaNO_3+H_2O\)

\(CuCl_2+2NaOH\rightarrow Cu\left(OH\right)_2+2NaCl\)

\(\left(NH_4\right)SO_4+2NaOH\xrightarrow[t^o]{}Na_2SO_4+2NH_3+2H_2O\) 

b) \(SO_3+Ca\left(OH\right)_2\rightarrow CaSO_4+H_2O\) 

\(2HNO_3+Ca\left(OH\right)_2\rightarrow Ca\left(NO_3\right)_2+2H_2O\)

\(CuCl_2+Ca\left(OH\right)_2\rightarrow Cu\left(OH\right)_2+CaCl_2\)

\(\left(NH_4\right)SO_4+Ca\left(OH\right)_2\underrightarrow{t^o}CaSO_4+2NH_3+2H_2O\)

Bazo tan, làm quỳ tím ẩm hóa xanh

Đáp án A

A

Bài 1:

H2 + O2 → H2O

N2O5 + H2O → HNO3

Bài 4:

Fe2(SO3)3: Sắt III sunfat 

Mg(OH)2: Magie hidroxit

H3PO4: axit photphoric

Ba(HSO4)2: Bari Bisunfat 

Bài 1 : 

\(a.2H_2+O_2\underrightarrow{^{t^0}}2H_2O\)

\(b.N_2O_5+H_2O\rightarrow2HNO_3\)

Bài 2 : 

\(n_{Al}=\dfrac{5.4}{27}=0.2\left(mol\right)\)

\(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)

\(0.2............0.3...........0.1..............0.3\)

\(m_{H_2SO_4}=0.3\cdot98=29.4\left(g\right)\)

\(m_{Al_2\left(SO_4\right)_3}=0.1\cdot342=34.2\left(g\right)\)

\(m_{H_2}=0.3\cdot2=0.6\left(g\right)\)

\(V_{H_2}=0.3\cdot22.4=6.72\left(l\right)\)

Bài 3 : 

\(n_{A\left(OH\right)_n}=0.2\cdot1=0.2\left(mol\right)\)

\(2A+2nH_2O\rightarrow2A\left(OH\right)_n+nH_2\)

\(0.2........................0.2\)

\(M_A=\dfrac{8}{0.2}=40\left(\dfrac{g}{mol}\right)\)

\(A:Canxi\:\)

Bài 4 : 

Fe₂(SO₄)₃ : Sắt (III) sunfat 

Mg(OH)₂ : Magie hidroxit

H₃PO₃: Axit photphoro

Ba(HSO₄)₂: Bari hidrosunfat