Question

Помогите сделать ОВР 1. HCl + Ca -> CaCl2 + H2 2. C + O2 -> CO2

Answer 1

2HCl + Ca -> CaCl2 + H2
2H(+) +2e -> H2(0)    1    в-ие
ок-ль
Ca(0) -2e -> Ca(+2)   1   ок-ие
в-ль

С + O2 -> CO2
C(0) -4e -> C(+4)       1     ок-ие
в-ль
O2(0) +4e -> 2O(-2)  1     в-ие
ок-ль

Answer 2

Balancing Chemical Equations

To balance the given chemical equations, we need to ensure that the number of atoms of each element is the same on both sides of the equation. Let's start by balancing each equation step by step.

Balancing Equation 1: HCl + Ca -> CaCl2 + H2

The unbalanced equation is: HCl + Ca -> CaCl2 + H2

To balance this equation, we can follow these steps:

1. Balance the metals first, in this case, Ca: Ca + HCl -> CaCl2 + H2

2. Balance the non-metal atoms next, in this case, H: Ca + 2HCl -> CaCl2 + H2

3. Finally, balance the Cl atoms: Ca + 2HCl -> CaCl2 + H2

So, the balanced equation is: Ca + 2HCl -> CaCl2 + H2

Balancing Equation 2: C + O2 -> CO2

The unbalanced equation is: C + O2 -> CO2

To balance this equation, we can follow these steps:

1. Balance the carbon atoms first: C + O2 -> CO2

2. Balance the oxygen atoms next: C + O2 -> 2CO2

So, the balanced equation is: C + O2 -> 2CO2

Now both chemical equations are balanced: 1. Ca + 2HCl -> CaCl2 + H2 2. C + O2 -> 2CO2