Question

BALANCE THE EQUATIONS

1.FeSO4 → Fe2O3 + SO2 + SO3
2.Pb(NO3)2 + KI → PbI2 + KNO3
3.Na2SO4 + BaCl2 → BaSO4 + NaCl
4.MnO2 + HCl → MnCl2 + H2O + Cl2
5.What is the difference between chemical change and chemical equation?
6.Why do balance a chemical equation?

Answer 1

Explanation:

1. 2FeSO4 ---------> Fe2O3+ SO2+SO3

2.Pb(NO3)2+2KI--------->PbI2+2KNO3

3.Na2SO4+BaCl2------>BaSO4+2NaCl

4.MnCl2+Cl2+2H2O-------->MnO2+4HCl

5.There is no difference. Chemical changes are also known as Chemical Reactions - a change that results in the formation of new chemical substances. At the molecular level, chemical change involves making or breaking of bonds between atoms. These changes are chemical - for example, iron rusts and iron oxide is formed.

6.A chemical equation must be balanced because the Law of Conservation of matter must be hold good during a chemical equation. Balancing of equation is necessary because atoms are neither created nor destroyed during a chemical equation.

HOPE IT HELPS!!

Answer 2

Answer:

the balanced equations are-

1) 2FeSO4= Fe2O3+SO2+SO3

2)Pb(NO3)2 + 2KI = 2KNO3 + PbI2

3)BaCl2 + Na2SO4 = BaSO4 + 2NaCl

4)Mno2+Hcl=MnCl2+H2O+Cl2

5)Chemical reaction refers to the process where two or more substances react together to form products. Chemical equation is the representation of chemical reactions using symbols.

Chemical reaction is the process in which one reactant breaks or two or more reactants reacts to form one or more products but chemical equation represents the reaction which had occured by symbols.

6)Chemical equations need to be balanced in order to satisfy the law of conservation of matter, which states that in a closed system matter is neither created nor destroyed.

hope it helps you :)

by Roshni