There must be the same number of atoms of each element on both sides of the equation.
Explanation: This is the only way the equations will be balanced. Adding the coefficients to see if they are equal will not guarantee that the equations are balanced becuase coefficients can be turned into subscripts.
Coefficients need to be changed while balancing a chemical reaction beacuse subscript show how the molecule exists in nature
Chemical equations are first written as a skeleton equation, which includes how many atoms each element and compound has. Skeleton equations are not 'balanced' because the number of atoms of each element on the left side (reactants) is not equal to the right side (products).
To balance a chemical equation, you can write coefficients in front of single elements and compounds. The coefficient multiplies with each single element and with each element in the compound.
For example, in this skeleton equation:
H₂ + Cl₂ => HCl
2 hydrogen 1 hydrogen
2 chlorine 1 chlorine
Write the coefficient 2 in the products.
H₂ + Cl₂ => 2HCl
Now both reactant and product sides have 2 chlorine and 2 hydrogen, so the equation is balanced.
Explanation:so that the number of atoms of the element is the same on each side of the equation.
not be changed to balance an equationSubscripts are part of the chemical formula for reactants or products and can
Changing a subscript changes the substance represented by the formula
Only coefficients can be changed
Subscripts are the identity of the element (the number of atoms) whereas coefficients are the number of molecules of the element.
If you change the subscript, you change the number of atoms an element has. This changes the entire element since each element in the periodic table have different atomic numbers.