Question

Помогите решить. Вариант № _1_ 1.Допишите уравнения реакций, протекающих до конца. Составьте к ним полные и краткие ионные уравнения реакций. а) ZnCl2 + Ba(OH)2 → б) AgNO3 + KCl→ в) H2SO4 + Ca(OH)2 → (6 баллов) 2Приведите полные ионные и молекулярные уравнения реакций, соответствующие сокращенным ионным уравнениям: ZnO + 2H+ = Zn2+ + H2O, ОН- + H+ = H2O, Ag+ + Cl– = AlCl, (6 баллов) 3.Осуществить превращения и определить тип реакций. (2 балла за уравнение). Zn ——> ZnO ——> Zn SО4——> Ва SО4. Для реакции №1 показать окислитель и восстановитель.

Answer 1

1) ZnCl2 + Ba(OH)2 -> Zn(OH)2↓ + BaCl2
Zn(+2) + 2Cl(-) + Ba(+2) + 2OH(-) -> Zn(OH)2↓ + Ba(+2) + 2Cl(-)
Zn(+2) + 2OH(-) -> Zn(OH)2↓

AgNO3 + KCl -> AgCl↓ + KNO3
Ag(+) + NO3(-) + K(+)+ Cl(-)-> AgCl↓ + K(+) + NO3(-)
Ag(+) + Cl(-) -> AgCl↓

H2SO4 + Ca(OH)2 -> CaSO4↓ + 2H2O
2H(+) + SO4(-2) + Ca(OH)2 -> CaSO4 + 2H2O

2)  ZnO + 2HCl -> ZnCl2 + H2O
ZnO + 2H(+) + 2Cl(-)-> Zn(+2) + 2Cl(-) + H2O

NaOH + HCl -> NaCl + H2O
Na(+) + OH(-) + H(+) + Cl(-) -> Na(+) + Cl(-)+ H2O

AgNO3 + HCl -> AgCl↓ + HNO3
Ag(+) + NO3(-) + H(+) + Cl(-) -> AgCl ↓+ H(+) +NO3(-)

3)  2Zn + O2 -> 2ZnO   ( реакция соединения)
   Zn(0) -2e -> Zn(+2)     2     ок-ие
в-ль
   O2(0) +4e -> 2O(-2)   1     в-ие
ок-ль

ZnO + H2SO4 -> ZnSO4 + H2O (реакция обмена)
ZnSO4 + BaCl2 -> BaSO4↓ + ZnCl2  (реакция обмена)

Answer 2

Task 1: Writing and Balancing Equations

a) ZnCl2 + Ba(OH)2 →

b) AgNO3 + KCl →

c) H2SO4 + Ca(OH)2 →

To write the balanced equations, we need to determine the products formed when the reactants react. Let's analyze each reaction:

a) ZnCl2 + Ba(OH)2 →

Zinc chloride (ZnCl2) is a salt composed of zinc ions (Zn2+) and chloride ions (Cl-). Barium hydroxide (Ba(OH)2) is a base composed of barium ions (Ba2+) and hydroxide ions (OH-). When these two compounds react, a double displacement reaction occurs, resulting in the formation of zinc hydroxide (Zn(OH)2) and barium chloride (BaCl2).

The balanced equation for this reaction is:

ZnCl2 + Ba(OH)2 → Zn(OH)2 + BaCl2

b) AgNO3 + KCl →

Silver nitrate (AgNO3) is a salt composed of silver ions (Ag+) and nitrate ions (NO3-). Potassium chloride (KCl) is a salt composed of potassium ions (K+) and chloride ions (Cl-). When these two compounds react, a double displacement reaction occurs, resulting in the formation of silver chloride (AgCl) and potassium nitrate (KNO3).

The balanced equation for this reaction is:

AgNO3 + KCl → AgCl + KNO3

c) H2SO4 + Ca(OH)2 →

Sulfuric acid (H2SO4) is an acid composed of hydrogen ions (H+) and sulfate ions (SO4^2-). Calcium hydroxide (Ca(OH)2) is a base composed of calcium ions (Ca2+) and hydroxide ions (OH-). When these two compounds react, a double displacement reaction occurs, resulting in the formation of calcium sulfate (CaSO4) and water (H2O).

The balanced equation for this reaction is:

H2SO4 + Ca(OH)2 → CaSO4 + 2H2O

Task 2: Complete Ionic and Molecular Equations

The given reactions are:

1) ZnO + 2H+ → Zn2+ + H2O 2) OH- + H+ → H2O 3) Ag+ + Cl- → AgCl

To write the complete ionic equations, we need to separate all the reactants and products into their respective ions. The spectator ions, which do not participate in the reaction, are omitted. The complete ionic equations for the given reactions are:

1) ZnO + 2H+ → Zn2+ + H2O Complete Ionic Equation: ZnO + 2H+ → Zn2+ + H2O

2) OH- + H+ → H2O Complete Ionic Equation: OH- + H+ → H2O

3) Ag+ + Cl- → AgCl Complete Ionic Equation: Ag+ + Cl- → AgCl

To write the molecular equations, we simply combine the ions to form the compounds. The molecular equations for the given reactions are:

1) ZnO + 2H+ → Zn2+ + H2O Molecular Equation: ZnO + 2H+ → Zn2+ + H2O

2) OH- + H+ → H2O Molecular Equation: OH- + H+ → H2O

3) Ag+ + Cl- → AgCl Molecular Equation: Ag+ + Cl- → AgCl

Task 3: Reaction Types

The given reactions are:

1) Zn → ZnO → ZnSO4 → BaSO4

The reactions can be classified as follows:

1) Zn → ZnO: This is a redox reaction, specifically an oxidation reaction. Zinc (Zn) is oxidized to zinc oxide (ZnO).

2) ZnO → Zn