Question

дана схема превращений:Fe->FeO->Fe(OH)2->FeCl2.составить малекулярные уравнения реакций. дана схема превращений:H2->H2O->Ca(OH)2->CaO .составить малекулярные уравнения реакций. дана схема превращений:O2->H2O->H2->HCl.составить малекулярные уравнения реакций.

Answer 1

Fe + Fe2O3 = 3FeO

FeO → H2O → Fe(OH)2

FeO + 2HNO3(разб.) = Fe(NO3)2 + H2OFeSO3 + H2O = Fe(OH)2 + SO2↑

Fe(OH)2 + 2HCl(разб.) = FeCl2 + 2H2O

 

 

2H2 + O2 = 2H2O

CaO + H2O = Ca(OH)2

Ca(OH)2 → H2O → H2 → Ca

  Ca(HSO4)2 + Ca(OH)2 = 2CaSO4 + 2H2OLiH + H2O = LiOH + H2↑ CaC2 + H2 = Ca + C2H2

 

 

 

2H2 + O2 = 2H2O

2H2O = 2H2↑(катод) + O2↑(анод)

Cl2 + H2 = 2HCl

Answer 2

2 Fe + O2 => 2 FeO (в кислороде) 
FeO + NaHCO3 + NaOH => Fe(OH)2 + Na2CO3 (сплавление порошков)
Fe(OH)2 + 2 HCl => FeCl2 + 2 H2O

2 H2 + O2 => 2 H2O
H2O + CaO => Ca(OH)2
Ca(OH)2 => CaO + H2O (нагревание)

O2 + 2 H2 => 2 H2O
2 H2O + 2 Na => 2 NaOH + H2
H2 + Cl2 => 2 HCl

Answer 3

Fe -> FeO -> Fe(OH)2 -> FeCl2

The given scheme of transformations involves the conversion of iron (Fe) into iron(II) chloride (FeCl2) through several intermediate steps. Let's break down the reactions and write the molecular equations for each step:

1. Fe -> FeO: - Iron (Fe) reacts with oxygen (O) to form iron(II) oxide (FeO). - The balanced molecular equation for this reaction is: Fe + O2 -> FeO.

2. FeO -> Fe(OH)2: - Iron(II) oxide (FeO) reacts with water (H2O) to form iron(II) hydroxide (Fe(OH)2). - The balanced molecular equation for this reaction is: FeO + H2O -> Fe(OH)2.

3. Fe(OH)2 -> FeCl2: - Iron(II) hydroxide (Fe(OH)2) reacts with hydrochloric acid (HCl) to form iron(II) chloride (FeCl2). - The balanced molecular equation for this reaction is: Fe(OH)2 + 2HCl -> FeCl2 + 2H2O.

H2 -> H2O -> Ca(OH)2 -> CaO

The given scheme of transformations involves the conversion of hydrogen (H2) into calcium oxide (CaO) through several intermediate steps. Let's break down the reactions and write the molecular equations for each step:

1. H2 -> H2O: - Hydrogen gas (H2) reacts with oxygen (O2) to form water (H2O). - The balanced molecular equation for this reaction is: H2 + O2 -> H2O.

2. H2O -> Ca(OH)2: - Water (H2O) reacts with calcium oxide (CaO) to form calcium hydroxide (Ca(OH)2). - The balanced molecular equation for this reaction is: CaO + H2O -> Ca(OH)2 [[3]](https://elar.urfu.ru/bitstream/10995/34779/1/978-5-321-02439-3.pdf).

3. Ca(OH)2 -> CaO: - Calcium hydroxide (Ca(OH)2) decomposes to form calcium oxide (CaO) and water (H2O). - The balanced molecular equation for this reaction is: Ca(OH)2 -> CaO + H2O [[3]](https://elar.urfu.ru/bitstream/10995/34779/1/978-5-321-02439-3.pdf).

O2 -> H2O -> H2 -> HCl

The given scheme of transformations involves the conversion of oxygen (O2) into hydrochloric acid (HCl) through several intermediate steps. Let's break down the reactions and write the molecular equations for each step:

1. O2 -> H2O: - Oxygen gas (O2) reacts with hydrogen gas (H2) to form water (H2O). - The balanced molecular equation for this reaction is: O2 + 2H2 -> 2H2O.

2. H2O -> H2: - Water (H2O) can be decomposed into hydrogen gas (H2) through a process called electrolysis. - The balanced molecular equation for this reaction is: 2H2O -> 2H2 + O2.

3. H2 -> HCl: - Hydrogen gas (H2) reacts with chlorine gas (Cl2) to form hydrochloric acid (HCl). - The balanced molecular equation for this reaction is: H2 + Cl2 -> 2HCl.

Please note that the reactions provided are simplified molecular equations and may not represent the complete reaction mechanisms or conditions required for each transformation.