(a) Define a balanced chemical equation. Why should an equation be balanced?
(b) Write the balanced chemical equation for the following reaction:
(i) Phosphorus burns in presence of chlorine to form phosphorus penta chloride.
(ii) Burning of natural gas.
(iii) The process of respiration.
Answers
Answer:
a). A chemical equation needs to be balanced because a chemical reaction is just a rearrangement of atoms. Atoms themselves are neither created nor destroyed during the course of a chemical reaction. The chemical equation needs to be balanced to follow the law of conservation of mass.
b)Balanced chemical equation for given chemical reaction
1. Burning of phosphorus in the presence of chlorine
To obtain Phosphorus pentachloride, phosphorous must be burnt in an excess amount of chlorine.
The balanced chemical equation involved in the chemical reaction as follows:
P_{4}+10 C l_{2} \rightarrow 4 P C l_{5}
2. Combustion of natural gas
The reactant involved in the reaction is natural gas and oxygen. The molecular formula of natural gas is CH_4.
The balanced chemical equation involved in the chemical reaction as follows:
CH_4+2O_2\rightarrow CO_2+2H_2O
3. Process of respiration
The reactants involved in the respiration process are glucose and oxygen.
The molecular formula of glucose is C_6H_{12}O_6.
The balanced chemical equation involved in the chemical reaction as follows:
C_6H_{12}O_6+6O_2\rightarrow 6CO_2+6H_2O+ATP
Answer:
make me brainliest
Explanation:
(a) Balanced chemical equation has an equal number of atoms of different elements in the reactants and products. According to law of conservation of mass, matter can neither be created nor be destroyed in a chemical reaction.
(b)(i) P4 (s) + 10Cl2 (g) ———> 4PCl5 (S)
(i)CH4 (g) + 2O2 (g) ———> CO2 (g) + 2H2O(l) + heat energy
(iii) C6H12O6 (s) + 6O2 (g) + 6H2O ———> 6CO2 (aq) + 12H2O (l) + energy