Answer:
The balanced chemical reaction has equal number of atoms in reactant side as well as product side.
Explanation:
The balanced chemical reactions is as follows.
1.
![Zn+2HCl\rightarrow ZnCl_{2}+H_{2}](https://tex.z-dn.net/?f=Zn%2B2HCl%5Crightarrow%20ZnCl_%7B2%7D%2BH_%7B2%7D)
2.
![4Fe+3O_{2}\rightarrow 2Fe_{2}O_{3}](https://tex.z-dn.net/?f=4Fe%2B3O_%7B2%7D%5Crightarrow%202Fe_%7B2%7DO_%7B3%7D)
3.
![2H_{2}O_{2}\rightarrow 2H_{2}O +O_{2}](https://tex.z-dn.net/?f=2H_%7B2%7DO_%7B2%7D%5Crightarrow%202H_%7B2%7DO%20%2BO_%7B2%7D)
4.
![NaHCO_{3}+HC_{2}H_{3}O_{2} \rightarrow NaC_{2}H_{3}O_{2}+H_{2}CO_{3}](https://tex.z-dn.net/?f=NaHCO_%7B3%7D%2BHC_%7B2%7DH_%7B3%7DO_%7B2%7D%20%5Crightarrow%20NaC_%7B2%7DH_%7B3%7DO_%7B2%7D%2BH_%7B2%7DCO_%7B3%7D)
![H_{2}CO_{3}\rightarrow H_{2}O+CO_{2}](https://tex.z-dn.net/?f=H_%7B2%7DCO_%7B3%7D%5Crightarrow%20H_%7B2%7DO%2BCO_%7B2%7D)
![NaHCO_{3}+HC_{2}H_{3}O_{2}\rightarrow H_{2}O+CO_{2}+NaC_{2}H_{3}O_{2}](https://tex.z-dn.net/?f=NaHCO_%7B3%7D%2BHC_%7B2%7DH_%7B3%7DO_%7B2%7D%5Crightarrow%20H_%7B2%7DO%2BCO_%7B2%7D%2BNaC_%7B2%7DH_%7B3%7DO_%7B2%7D)
Explanation:
Activation energy is the minimum amount of energy required for a chemical reaction to take place.
When a chemical reaction occurs then bonds between the reactants break and bonds between the products are formed. This leads to the formation of an activated complex which is also known as transition state.
So, in order to form the activated complex a minimum amount of energy is necessary and this energy is known as activation energy.
The solubilty product (Ksp) of PbCl₂ : Ksp = [Pb²⁺][Cl⁻]²
<h3>Further explanation</h3>
Given
PbCl₂ compound
Required
The solubilty product (Ksp)
Solution
Ksp is the product of ions in an equilibrium saturated state
For reaction :
AₓBₐ (s) ⇔ aAᵃ⁺ (aq) + b Bᵇ⁻ (aq)
Can be formulated :
Ksp = [Aᵃ⁺] ᵃ [Bᵇ⁻] ᵇ
For PbCl₂ :
PbCl₂(s)⇔Pb²⁺(aq) + 2Cl⁻(aq)
Ksp = [Pb²⁺][Cl⁻]²
Centimeters are units of length.