Vocabulary
What is a third factor that can influence your experiment and lead you to incorrect conclusions?
Confounding variable
What kind of reaction is this?
C2H6 + O2 → CO2 + H2O
Combustion
Where do we find collision that breaks bonds?
In a reactant molecule
Balance:
___N2O5 → ___N2 + ___O2
2, 2, 5
Is this equation balanced?
2Al + 6HCl --> 2AlCl3 + 3H2
YES! All atoms are balanced on both the reactant and product sides.
What is a factor, trait, or condition that is intentionally held / unchanged throughout the experiment to ensure a fair test?
Controlled Variable
What kind of reaction is this?
Al + Fe2O3 → Fe + Al2O3
Single Replacement
What part of a chemical reaction do we find new bonds formed?
Product molecule
Balance:
__HBr + __Mg(OH)2 → __MgBr2 + __H2O
2, 1, 1, 2
What do we call the whole number placed in front of a chemical formula in a balanced equation to indicate the number of molecules, atoms, or moles involved?
Coefficient
What is the minimum amount of energy that is required to activate atoms or molecules to a condition in which they can undergo chemical transformation or physical transport?
Activation Energy
What kind of reaction is this?
H2 + O2 → H2O
Synthesis
Do all collisions lead to a chemical reaction?
NO! If they do not have the sufficient amount of kinetic energy, then a collision will not necessarily
Balance:
__HC2H3O2 + __KNO2 → __KC2H3O2 + __HNO2
1, 1, 1, 1
Balance:
__(NH4)3N + __Cr(CrO4)2 → __(NH4)2CrO4 + __Cr3N4
4, 3, 6, 1
What is the branch of chemistry that calculates the quantitative relationships (ratios) between reactants and products in a balanced chemical reaction?
Stoichiometry
What kind of reaction is this?
H2O2 → H2O + O2
Decomposition
When temperature increases, how does kinetic energy change?
Kinetic energy also increases
__AlCl3 + ___H2O → ___Al(OH)3 + ___HCl
1, 3, 1, 3
Balance:
__Cu3(PO4)2 + __Na2SO4 → __Na3PO4 + __CuSO4
1, 3, 2, 3
What is a lasting, strong force of attraction that holds atoms, ions, or molecules together, allowing them to form stable compounds?
A chemical bond
What are 3 factors that affect chemical reaction rates?
Catalysts, temperature, surface area
When the energy of the system is ________ than the activation energy, molecules have enough kinetic energy to break bonds, and a reaction occurs.
Greater
__Al(HCO3)3 + ___AlPO4 → ___Al2(CO3)3 + ___H3PO4
1, 1, 1, 1
__HOCl + __C → __H2O + __CO2 + __Cl2
4, 1, 2, 1, 2