Balancing Equations
What is the right side of a chemical equation known as?
Products
What happens to particles when you heat them up?
They move faster causing more collisions
In your science report, what is discussed in the reliability section?
Accuracy of the tests
Balance: Ca + O2 --> CaO
2Ca + O2 --> 2CaO
Reactants
What happens to particles when you cool them down?
They move slower causing less collisions
What is the research question that everyone should have?
How does the change in temperature affect the rate of reaction of sodium thiosulfate when hydrochloric acid is added?
Balance: HCl + NaOH ---> NaCl + H2O
HCl + NaOH ---> NaCl + H2O
What is the name of the numbers that go at the start of molecules?
Co-efficient
Define the Law of Conservation of Mass.
This means the number and type of atoms going INTO a reaction must be the same as the number and type of atoms coming OUT.
List 3 things that should be in your background of the assignment.
Rate of reactions definition, factors affecting rate of reaction (temperature), an equation, a balanced equation.
Balance: HCl + Zn --> ZnCl2 + H2
2 HCl + Zn --> ZnCl2 + H2
What is the name of the little numbers that go to the bottom right of the letters?
Subscript
What are rates of reaction?
The speed at which chemical reactions take place.
What was the independent variable?
Temperature
Balance: Fe + Cl2 --> FeCl3
2Fe + 3 Cl2 --> 2FeCl3
Balance C2H5OH + O2 --> CO2 + H2O
C2H5OH + 3 O2 → 2 CO2 + 3 H2O
What is Ms Box's coffee order?
Ms Box to answer
What is the dependent variable?
Balance: HCl + CaCO3 --> CaCl2 + CO2 + H2O
6 HCl + 3 CaCO3 --> 3 CaCl2 + 3 CO2 + 3 H2O