Question

Расставьте коэффициенты методом электронного баланса N2O5 + H2O → HNO3 Mg + ZnCl2 → MgCl2 + Zn AlCl3 + NaOH → Al(OH)3 + NaCl

Answer 1

Ответ:

Объяснение:

Расставьте коэффициенты методом электронного баланса

N2O5 + H2O = 2 HNO3                   это не  ОВР

Mg + ZnCl2 =  MgCl2 + Zn

Mg(0) - 2e  =  Mg+2   окисление,  Mg - восстановитель    ║ 1

Zn+2 + 2e   =  Zn(0)  восстановление,  Zn+2 - окислитель║1

AlCl3 + 3NaOH → Al(OH)3↓ + 3NaCl               это не  ОВР

Answer 2

#### Balancing Chemical Equations using the Electron Balance Method To balance the given chemical equations using the electron balance method, we need to ensure that the number of atoms of each element is the same on both sides of the equation. We can achieve this by adjusting the coefficients in front of each compound. Let's balance the equations one by one: 1. N2O5 + H2O → HNO3 To balance this equation, we start by counting the number of atoms for each element on both sides of the equation: **Left side:** - N: 2 - O: 5 **Right side:** - H: 1 - N: 1 - O: 3 To balance the equation, we can start by balancing the oxygen atoms. Since there are 5 oxygen atoms on the left side and 3 on the right side, we need to add a coefficient of 5/3 in front of HNO3: N2O5 + H2O → **(5/3)** HNO3 Next, we balance the hydrogen atoms. There are 2 hydrogen atoms on the left side and 6/3 (which simplifies to 2) on the right side. Therefore, no additional coefficients are needed for H2O. The balanced equation is: **2 N2O5 + 3 H2O → 5 HNO3** 2. Mg + ZnCl2 → MgCl2 + Zn **Left side:** - Mg: 1 - Zn: 1 - Cl: 2 **Right side:** - Mg: 1 - Zn: 1 - Cl: 2 The equation is already balanced. 3. AlCl3 + NaOH → Al(OH)3 + NaCl **Left side:** - Al: 1 - Cl: 3 - Na: 1 - O: 1 - H: 1 **Right side:** - Al: 1 - Cl: 1 - Na: 1 - O: 3 - H: 3 To balance the equation, we can start by balancing the chlorine atoms. There are 3 chlorine atoms on the left side and 1 on the right side. To balance them, we need to add a coefficient of 3 in front of NaCl: AlCl3 + NaOH → Al(OH)3 + **3** NaCl Next, we balance the hydrogen and oxygen atoms. There is 1 hydrogen atom on the left side and 3 on the right side. To balance them, we need to add a coefficient of 3 in front of H2O: AlCl3 + **3** NaOH → Al(OH)3 + 3 NaCl The balanced equation is: **AlCl3 + 3 NaOH → Al(OH)3 + 3 NaCl** Please note that the coefficients in front of the compounds represent the number of molecules or formula units, not the number of atoms. I hope this helps! Let me know if you have any further questions.