Vocabulary Terms
What is the oxidation number?
charge found on the element after it has formed a compound by donating, accepting or sharing electrons
What type of reaction is this: 4Fw+3O2 --> 2Fe2O3
Combination or Synthesis
What process was conducted for the barf bag experiment?
anaerobic process - alcoholic fermentation
4Al + 3O2 --> ______Al2O3
What is an ionic bond?
bond that is formed between metals & nonmetals that involve a transfer of electrons
What type of reaction is this:
Fe + CuSO4 --> FeSO4+Cu
Single Replacement
List three chemical changes that occurred during the LAB-AIDS Identification of Chemical Reactions Lab that you were able to notice.
-cloudy white color
-increased odor
-change of color
-no change
-bubbling reaction
2H2 + O2 --> ______H2O
2
What is a covalent bond?
a bond formed between two nonmetals & involve a sharing of electrons
What type of reaction is this:
2C2H6 + 7O2 --> 4CO2 + 6H2O
Combustion
Describe the reaction that occurred in the barf bags to produce what two products?
alcoholic fermentation broke down glucose to produce carbon dioxide & ethyl alcohol
___Fe + ____O2 --> 2Fe2 O3
4 / 3
What does the law of conservation of matter state?
mass is neither created nor destroyed in a non nuclear reaction
the total mass of the reactants must equal the total mass of the products
What type of reaction is this:
CuCO3 --> CuO + CO2
How can forensic scientists accurately decipher remains of medications within a body after death?
Hint: STEMscopes Crime Lab
Based on % composition of the compounds found in the bodies
How does a balanced equation show the conservation of mass?
a balanced equation shows how mass is conserved because there is the same amount of each element on the reactants side and on the products side
What is stoichiometry?
"measure of elements"
culmination of many concepts in chemistry: dimensional analysis, moles, molar mass, molar volumes, concentrations, balanced chemical equations
What type of reaction is this:
HCl + NaOH --> H2O + NaCL
Explain the chemical reaction that occurred in the exploding sandwich bag experiment?
The CO2 gas expanded in the sandwich bag & when the pressure increased higher than the bag's lock zipper, the bag exploded to release the gas
When a copper penny corrodes, it seems to get heavier in mass. Does the penny follow the law of conservation of mass? Why, Why not?
YES! copper chemically combined with the oxygen in the air. When oxygen is added to the mass of the chemicals in the reactants, the mass of the reactants and the products will be equal