Help write a chemical equation, please write a chemical equation

Fe(NO3)3+4HNO3=Fe(NO3)3+NO+2H2O3FE+8HNO3=FE(NO3)3+2NO +4H2OThe first case is that it only occurs and generates Fe(NO3)3; It's an excess of nitric acid.

In the second case, it only occurs and generates Fe(NO3)2; Iron overload.

The third case is the occurrence of both and occurrence of , and the resulting salt has both Fe(NO3)3 and Fe(NO3)2

In these three cases, there was no excess of Fe and Hno3, and all of them were completely reactive.

In fact, the essence is to react first to generate Fe(No3)3, and if Fe is surplus, it will react with Fe(No3)3 to form Fe(No3)2

The equation is written above.

Water is only used as an oxidant: early blind 2Na + 2H2O = 2NaOH + H2 Water is only used as a reducing agent: Na2O2 + 2H2O = 4NaOH + 02 Water is both an oxidant and a reducing agent

2H2O = 2H2 + O2 Water participates in the reaction, but is neither an oxidizing agent nor a reducing agent: H2O+Cl2=HCl+HCl

Hope it can help you

c+cuo==cu+co or.

c+2cuo==2cu+co2↑

When the carbon mass is the lowest, all CO2 bonds are generated.

x 8012：x=160：80

x = 6g at least 6 grams of carbon is required for manuscript laughter. Proclamation.

c+2cuo=2cu+CO2 The relative molecular mass of Cuo is 80*2, then the mass of c is calculated by the column formula to be 6g

c+2cuo==2cu+co2↑

x 8012：x=160：80

x=6g requires at least 6 grams of carbon footprint to be missing.

The previous answer is either no gas and precipitation notation, or no chemical formula, and the correct one should be as follows:

mg(no3)2+na2co3===mgco3↓+2nano3caco3+2hci===caci2+h2o+co2↑mgco3+2hno3===mg(no3)2+h2o+co2↑ai(oh)3+hno3===ai(no3)3+3h2ofe2o3+6hci====2feci3+3h2o3naoh+feci3===fe(oh)3↓+3naciba(oh)2+k2co3===baco3↓+2kohcuso4+ba(no3)2===baso4↓+cu(no3)2na2co3+ca(oh)2====caco3↓+2naohfeci3+3agno3+====3agci↓+fe(no3)3

1.Sodium nitrate + magnesium carbonate (precipitate).

2.Calcium hydrochloride + carbon dioxide (gas symbol) + oxygen (gas symbol) (remember the trim) 3Magnesium nitrate + carbon dioxide (gas symbol) + oxygen (gas symbol) (remember the trim) 4Aluminum nitrate + water (remember trim).

5.Iron hydrochloric acid + water (remember trimming).

6.Sodium chloride + iron hydroxide (precipitate) (remember trim) 7Potassium hydroxide + barium carbonate (precipitate).

8.Copper nitrate + barium sulfate (precipitate).

9.Sodium hydroxide + calcium carbonate (precipitate).

10.Ferric nitrate + silver chloride (precipitate).

mg(no3)2+na2co3=mgco3+2nano3caco3+2hcl=cacl2+h20+co2mgco3+2hno3=mg(no3)2++h20+co2al(oh)3+3hno3=al(no3)3+3h2ofe(oh)2+2hcl=fecl2+2h2o3naoh+fecl3=3nacl+fe(oh)3ba(oh)2+K2CO3 = seems to be a weak base to a strong base, and cannot react CuSO4 + BA (NO3) 2 = BaSO4 + Cu (NO3) 2Na2CO3 + Ca(OH) 2 = CaCO3 + 2NaOHfeCl3 + 3AGNO3 = 3AGCL + Fe(NO3) 3

Mg(NO3)2+Na2CO3=2nano3+MgCO3 (precipitation)CaCO3+2HCI=CACI2+H2O+CO2MGC3+2HNO3=MG(NO3)2+H2O+CO2 (gas) AI(OH)3+HNO3=AI(NO3)3+3H2OFE2O2O3+6HCI=2FECI3+3H2O3NaOH+FECI3=Fe(OH)3 (grayish-brown precipitation)+3Naciba(OH)2+K2CO3=BAC3 (precipitate)+2KohcuSO4+BA(NO3)2=BaSO4 (precipitate) + Cu(NO3)2Na2CO3+Ca(OH)2=CaCO3 (precipitate) + 2NaOHfeci3+3AGNo3=3AGCI (precipitation) + Fe(NO3)3

(1) Ammonium zinc manganese battery: the electrolyte is mainly ammonium chloride, containing a small amount of zinc chloride.

Battery Symbol: (-Zn NH4Cl·ZnCl2 MNO2 (+.)

Total cell reaction: Zn+2NH4Cl+2MNO2=Zn(NH3)2Cl2+Mn2O3+H2O

7 Lead-acid battery (discharged).

Cathode (PBO2):

pbo2 + 2e- +so42- +4h+ →pbso4 + 2h2o

Negative electrode (PB) :p B- 2E-+ SO4)2- PBSO4

Total reaction formula: PB+PBO2+4H++ 2(SO4)2- == 2PBSO4 + 2H2O

6 Oxyhydrogen fuel cell (alkaline medium).

Positive electrode: O2 + 2H2O + 4E- 4Oh-

Negative electrode: 2H2 - 4E- +4OH- 4H2O

Total reaction formula: 2H2 + O2 == 2H2O

11 Silver-zinc coin cell batteries (alkaline medium).

Positive electrode (AG2O): AG2O + H2O + 2E- 2AG + 2OH-

Negative (Zn): Zn + 2OH - -2E- Zno + H2O

Total reaction formula: Zn + AG2O == Zno + 2AG

C+2H2SO4 (concentrated) = 2H2O+2SO2+CO2 (condition is high temperature).

so2+cl2+2h2o=2hcl+h2so4

2nh4cl + ca(oh)2 = cacl2 + 2nh3 + 2h2o

There is a third chemical reaction to pay attention to.

1) It is not possible to use NH4NO3 to react with Ca(OH)2 to produce ammonia.

Because NH4NO3 is an oxidizing ammonium salt, NH3 and HNO3 are generated at low temperature when heated, and as the temperature rises, the strong oxidation of nitric acid plays a role in making the generated ammonia further oxidized to produce nitrogen and nitrogen oxides, so NH4NO3 cannot be used to react with Ca(OH)2 to produce ammonia.

2) Laboratory-made NH3 cannot replace Ca(OH)2 with NaOH and KOH

Because NaOH and KOH are strong bases, they are hygroscopic (deliquescent) and easy to agglomerate, and are not easy to mix with ammonium salts for full contact reaction. In addition, KOH and NAOH have strong corrosiveness, and in the case of heating, they have a corrosive effect on glass instruments, so they do not use NAOH and KOH instead of CA (OH) 2 NH3.

3) Use a test tube to collect ammonia why the banquet should block cotton.

Because NH3 particles are small in diameter and easy to convection with air, the purpose of plugging cotton is to prevent NH3 from convection with air and ensure the purity of collection.

4) Why do we use alkali lime instead of concentrated H2SO4 and solid CaCl2 for the water vapor removal of NH3 prepared in the laboratory

Because concentrated H2SO4 reacts with NH3 to form (NH4)2SO4

NH3 reacts with CaCl2 to form other species.

5) A method for rapidly preparing ammonia in the laboratory.

Add solid NAOH (or heat concentrated ammonia) with concentrated ammonia

1 C + 2H2SO4 = Heat = CO2 + 2SO2 + 2H2O

2 so2 +cl2 +2h2o =h2so4+2hcl

3 2NH4Cl + CA(OH)2 = Heated Finch = CaCl2 + 2H2O + 2NH3