Chemical Reaction Lab
***Part I: How do chemical reactions work?
-Chemical reactions are occurring all the time.
-Reactions require energy.
-The energy is used to break the chemical bonds of the starting substances (the reactants) so that new substances are formed (the products).
-The atoms of the reactant molecules separate allowing them to re-combine to form the product molecules.
1) What are the starting substances (molecules) in a chemical equation called?
the reactants
2) What are the final or new substances (molecules) in a chemical reaction called?
the product
3) In your own words, describe what happens to the hydrogen and oxygen molecules when creating water. Something must be re-combined. How does this happen?
In a chemical reaction, the bonds between the hydrogen and oxygen are broken and they form two water molecules. This happens because they bond together.
***Part II: Chemical Formulas
-In a chemical reaction, molecules react with eachother to make new products.
-Each molecule is represented by a specific chemical formula.
-A chemical formula tells you how many atoms of each element are found within each substance.
-The number of atoms within a molecule are shown by a subscript, which is found after each elemental symbol.
- If there is no subscript after the atom, then there is only one atom of that element in the substance.
1) How many chemical formulas are you using in the group? State your group number and the chemical formula (state both if more than one).
Group number 3 has H2CO3 and we are using one formula.
2) What does a chemical formula represent? In other words, what type of information is found within a chemical formula?
In a chemical formula, you can find the number of atoms that there are of each element and you can find which substance it forms.
3) How many copper (Cu) atoms are there in the chemical formula CuO? one
4) How many oxygen (O) atoms are there in the chemical formula of KClO4? four
5) How many hydrogen (H) atoms are there in the chemical formula H2CO3? two
6) How many hydrogen (H) and nitrogen (N) atoms are there in the chemical formulas for Group #4? two and two
***Part III: Chemical Reactions
-Chemical reactions are occurring all the time.
-Reactions require energy.
-The energy is used to break the chemical bonds of the starting substances (the reactants) so that new substances are formed (the products).
-The atoms of the reactant molecules separate allowing them to re-combine to form the product molecules.
1) What are the starting substances (molecules) in a chemical equation called?
the reactants
2) What are the final or new substances (molecules) in a chemical reaction called?
the product
3) In your own words, describe what happens to the hydrogen and oxygen molecules when creating water. Something must be re-combined. How does this happen?
In a chemical reaction, the bonds between the hydrogen and oxygen are broken and they form two water molecules. This happens because they bond together.
***Part II: Chemical Formulas
-In a chemical reaction, molecules react with eachother to make new products.
-Each molecule is represented by a specific chemical formula.
-A chemical formula tells you how many atoms of each element are found within each substance.
-The number of atoms within a molecule are shown by a subscript, which is found after each elemental symbol.
- If there is no subscript after the atom, then there is only one atom of that element in the substance.
1) How many chemical formulas are you using in the group? State your group number and the chemical formula (state both if more than one).
Group number 3 has H2CO3 and we are using one formula.
2) What does a chemical formula represent? In other words, what type of information is found within a chemical formula?
In a chemical formula, you can find the number of atoms that there are of each element and you can find which substance it forms.
3) How many copper (Cu) atoms are there in the chemical formula CuO? one
4) How many oxygen (O) atoms are there in the chemical formula of KClO4? four
5) How many hydrogen (H) atoms are there in the chemical formula H2CO3? two
6) How many hydrogen (H) and nitrogen (N) atoms are there in the chemical formulas for Group #4? two and two
***Part III: Chemical Reactions