1. Đồng hydroxit
2 . Nitrous Oxide
3 . Barium Sulfate
4. Hydro Sulfide

-  Cu(OH)₂: copper(II) hydroxide

-  N₂O: dinitrogen oxide

-  BaSO₄: barium sulfate

-  H₂S: acid sulfide

\(1.Fe+H_2SO_4\rightarrow FeSO_4+H_2\\ 2.FeSO_4+2NaOH\rightarrow Fe\left(OH\right)_2+Na_2SO_4\\ 3.Fe\left(OH\right)_2+2HCl\rightarrow FeCl_2+2H_2O\\ 4.FeCl_2+2AgNO_3\rightarrow Fe\left(NO_3\right)_2+2AgCl\)

1:Fe+H2SO4->FeSO4+H2

2:FeSO4+BaCl2->BaSO4+FeCl2

3:2KOH+FeCl2->Fe(OH)2+2KCl

4: Fe(OH)2->(t*)FeO+H2O

5:FeO+CO->(t*)Fe+CO2

Base không tan:

Mg(OH)2: magnesium hydroxide.

Cu(OH)2: copper(II) hydroxide.

Fe(OH)3: iron(III) hydroxide.

 Fe(OH)2: iron(II) hydroxide.

Base kiềm

 KOH: potassium hydroxide.

Ba(OH)2:barium hydroxide

NaoOH:sodium hydroxide

Các Base là: \(Cu\left(OH\right)_2,Ba\left(OH\right)_2\)

acid: HCl, `H_2SO_4`

base: KOH, \(Fe\left(OH\right)_2\)

kiềm: không có kim loại kiềm chỉ có base kiềm là KOH

C% ddx=ZnSO₄: 22,06% ; H₂SO₄: 8,95% ; H₂O: 69,0%

Phương trình: \text{Zn} + \text{H}_{2}\text{SO}_{4} \rightarrow \text{ZnSO}_{4} + \text{H}_{2} \uparrow. Số mol các chất: n_{\text{Zn}} = \frac{19,5}{65} = 0,3 \text{ mol}. m_{\text{H}_{2}\text{SO}_{4}} = \frac{200 \cdot 24,5\%}{100\%} = 49 \text{ g} \Rightarrow n_{\text{H}_{2}\text{SO}_{4}} = \frac{49}{98} = 0,5 \text{ mol}. Biện luận: Vì 0,3 < 0,5 nên \text{Zn} hết, \text{H}_{2}\text{SO}_{4} dư. Tính toán sau phản ứng: n_{\text{H}_{2}\text{SO}_{4} \text{ pư}} = n_{\text{ZnSO}_{4}} = n_{\text{H}_{2}} = 0,3 \text{ mol}. m_{\text{H}_{2}\text{SO}_{4} \text{ dư}} = 49 - (0,3 \cdot 98) = 19,6 \text{ g}. m_{\text{ZnSO}_{4}} = 0,3 \cdot 161 = 48,3 \text{ g}. Khối lượng dung dịch sau phản ứng: m_{\text{dd}} = m_{\text{Zn}} + m_{\text{dd } \text{H}_{2}\text{SO}_{4}} - m_{\text{H}_{2}} = 19,5 + 200 - (0,3 \cdot 2) = 218,9 \text{ g}. Nồng độ phần trăm (C\%): C\%_{\text{ZnSO}_{4}} = \frac{48,3}{218,9} \cdot 100\% \approx 22,06\%. C\%_{\text{H}_{2}\text{SO}_{4} \text{ dư}} = \frac{19,6}{218,9} \cdot 100\% \approx 8,95\%.

Oxide acid: CO₂ , SO₂, SO₃

Oxide bazo: CuO, Na₂O, 

Oxide lưỡng tính: Al₂O₃

b, Acid là:
+ HCL:  hydrochloric acid
+ H₂SO₄: sulfuric acid
+ HNO₃: nitric acid
c, Base là:
+ KOH: potassium hydroxide
+ Ba(OH)_2: barium hydroxide
+ Cu(OH)₂ : copper (II) hydroxide
d, Muối là: 
+ Na₂CO₃: sodium cacbonat
+ CaSO₃ : calcium sunfit
+ NH₄Cl : ammonium chloride
+ NaHCO₃: sodium hydrogen carbonate
+ CH₃COONa: sodium acetat