- burning is an example of a chemical reaction
- the law of conservation of matter states that no atoms are created or destroyed in a chemical reaction
- a balanced chemical equation will show the same number of each type of atom on each side of the equation
2 hydrogen atoms on the reactants side and 2 hydrogen atoms on the products side.
2 oxygen atoms on the reactants side and 1 oxygen atom on the products side.
this chemical equation is NOT balanced.
Part A:
To balance a chemical equation, there must be an equal amount of elements and atoms on each side!
the subscript two in the compound represents the number of atoms of that element in the compound
The subscript in a chemical formula tells how many atoms of that compound are present.
Our answer to question B still remains constant because the subscript still represents the number of atoms in the compound.
1 Ca, 2 O, and 2 H
when a subscript is found outside of parentheses, you distribute the subscript to EACH atom in the compound in the parentheses.
this remains true when I add other subscripts
1 Ag, 3 Cl, 2 Cu
1 Ba, 2 As, 8 O
3 N, 12 H, 1 P, 4 O
1 Mn, 8 Pb, 6 Si, 21 O
To balance a chemical equation, there must be an equal amount of elements and atoms on each side!
the subscript two in the compound represents the number of atoms of that element in the compound
The subscript in a chemical formula tells how many atoms of that compound are present.
Our answer to question B still remains constant because the subscript still represents the number of atoms in the compound.
1 Ca, 2 O, and 2 H
when a subscript is found outside of parentheses, you distribute the subscript to EACH atom in the compound in the parentheses.
this remains true when I add other subscripts
1 Ag, 3 Cl, 2 Cu
1 Ba, 2 As, 8 O
3 N, 12 H, 1 P, 4 O
1 Mn, 8 Pb, 6 Si, 21 O
Part B:
In a chemical reaction, reactants are substances that enter into the reaction, and the products are the substances that are made in the reaction. A chemical reaction is balanced if the numbers of reactant atoms match the numbers of product atoms
oxygen is not balanced in the equation because there are 2 in the reactants but one in the proucts
To balance a chemical equation, you are not allowed to change the chemical formulas of the substances involved in the reaction. You ARE allowed to change the number of molecules of each substance by adding coefficients in front of the formulas.
you find two oxygen atoms after you add a 2 to "H2O"
you now have 4 hydrogen on the reactants side and two on product
this equation is NOT balanced.
Reactants= 1 Ca, 2 O, 3 H, 1 Br.................Products= 1 Ca, 1 O, 2 H, 2 Br
oxygen, hydrogen, and boron are out of balance.
Ca(OH)2 + 2HBr -------> CaBr2 + 2H2o
In a chemical reaction, reactants are substances that enter into the reaction, and the products are the substances that are made in the reaction. A chemical reaction is balanced if the numbers of reactant atoms match the numbers of product atoms
oxygen is not balanced in the equation because there are 2 in the reactants but one in the proucts
To balance a chemical equation, you are not allowed to change the chemical formulas of the substances involved in the reaction. You ARE allowed to change the number of molecules of each substance by adding coefficients in front of the formulas.
you find two oxygen atoms after you add a 2 to "H2O"
you now have 4 hydrogen on the reactants side and two on product
this equation is NOT balanced.
Reactants= 1 Ca, 2 O, 3 H, 1 Br.................Products= 1 Ca, 1 O, 2 H, 2 Br
oxygen, hydrogen, and boron are out of balance.
Ca(OH)2 + 2HBr -------> CaBr2 + 2H2o