Question

1.Запишите определение.Химическим уравнением называют ..2. Расставьте коэффициенты в схемах химических реакций:а) Ag2O → Ag+O2 ↑ в)NA + H2O → NaOH +H2 ↑б) Al + Cl2 → ALCI3 г) CaCO3 → CaO + CO2 ↑3. Расставьте коэффициенты в уравнениях химических реакций: а) C + H2 → СР4б) Zn + HCL → ZnCL2 + H2в) S + O2 → SO2г)Na2O + H2O → NaOHд)NaOH + H2SO4 → Na2SO4 + H2O

Answer 1

1. Химическим уравнением называют условную запись  химической реакции с помощью химических формул и математических знаков.
2.  а) 2Ag₂O = 2Ag + O₂

б)  2Al + 3Cl₂ = 2AlCl₃

в)  2Na + 2H₂O = 2NaOH + H₂

г)  CaCO₃ = CaO +  CO₂

3.  а)    С + 2H₂ = CH₄

б)  Zn  + 2HCl  = ZnCl₂ + H₂

в)  S + O₂ = SO₂

г)  Na₂O + H₂O = 2NaOH

д)  2NaOH + H₂SO₄ = Na₂SO₄ +2H₂O
 

Answer 2

Definition of Chemical Equation

A chemical equation is a symbolic representation of a chemical reaction, which shows the reactants and products involved in the reaction. It uses chemical formulas and symbols to represent the substances and indicates the relative amounts of each substance involved in the reaction. The reactants are written on the left side of the equation, separated by a plus sign (+), and the products are written on the right side, also separated by a plus sign. The equation is balanced by adjusting the coefficients in front of the chemical formulas to ensure that the number of atoms of each element is the same on both sides of the equation.

Balancing Chemical Equations

Balancing chemical equations involves adjusting the coefficients in front of the chemical formulas to ensure that the number of atoms of each element is the same on both sides of the equation. Here are the balanced equations for the given reactions:

a) Ag2O → 2Ag + O2 ↑ b) 2Na + 2H2O → 2NaOH + H2 ↑ c) 2Al + 3Cl2 → 2AlCl3 d) CaCO3 → CaO + CO2 ↑

Balancing Equations with Multiple Reactants

Balancing equations with multiple reactants follows the same principle of ensuring that the number of atoms of each element is the same on both sides of the equation. Here are the balanced equations for the given reactions:

a) C + 2H2 → CH4 b) Zn + 2HCl → ZnCl2 + H2 c) 2S + O2 → 2SO2 d) Na2O + H2O → 2NaOH e) 2NaOH + H2SO4 → Na2SO4 + 2H2O

Please note that the coefficients in front of the chemical formulas may vary depending on the specific conditions of the reaction. The balanced equations provided here are based on the given reactants and products.