Parts of Chemical Equation
What is the small number below the molecule called?
Subscript
Is this equation balanced? Justify your answer.
O2 ---- O5
No, it is not balanced. This is because the subscript 2 and 5 do not match.
What type of chemical reaction is this:
A+B ---- AB
Synthesis
CH4+O2 ---- CO2 + 2H2
Reactants: CH4+O2
Jasmine needs to balance an equation. She decided that the best way to do this is to change the subscripts. Is she correct? Explain why.
No Jasmine is incorrect. This is because subscripts can not be changed.
What chemical reaction breaks a compound down into simpler products? Give an example.
Decomposition.
AB ---- A+B
What is the one part in a chemical equation that cannot be changed?
Subscript
How do you know when an equation is balanced? You must use the words reactants and products in the explanation.
An equation is balanced when there is the same amount of molecules on both the reactants and products.
Burning fossil fuels is an example of....
Combustion
I can modify an equation by changing the _____.
Coefficients
What is the law of conservation of matter?
Total mass of reactants
=
Total mass of products
What is the difference between Single Displacement and Single Replacement?
There is no difference! They are synonyms.
What is always the product of combustion?
CO2+H2O
According to the packet, what are the 4 steps to balance an equation? Please list them in the correct order.
As the packet states:
"1.Write the equation.
2.Count the atoms on both sides of the equation (reactants and products).
3.Add coefficients in front of molecules to balance the number of atoms. Check coefficients to make sure they are in lowest terms.
4.Recount atoms on both sides of the equation."
List the 5 chemical reactions we learned about. Explain four of the ones you state.
Synthesis, decomposition, single displacement, double displacement and combustion. Explanations may vary.