Chemical Reactions

Question 1

Synthesis

Answer 1

When the reactants combine to create the product

Na+ Cl —> NaCl

Question 2

Combustion

Answer 2

Hydrocarbon and oxygen —> carbon dioxide and water

Question 3

Incomplete Combustion

Answer 3

Hydrocarbon and Oxygen —> Carbon Monoxide and carbon dioxide, water, and soot (solid carbon)

Question 4

Single displacement

Answer 4

one element replaces another

Na + BrF —> Br + NaF

Question 5

Double Displacement

Answer 5

cations and anions from two different compounds switch places to form two new compounds

NaCl + MgP —> NaP + MgCl

Question 6

Decomposition

Answer 6

a large or more complex molecule breaks down to form two (or more) simpler products

CO —> C + O

Question 7

What law must you use when balancing chemical equations/reactions

Answer 7

Law of conservation of mass: matter cannot be created or destroyed in a chemical reaction or physical transformation

Question 8

What signs must you add to the subscripts of chemical reactions/equations

Answer 8

Aq: aquious (in water)
S: Solid (metals, ionic compounds)
L: Liquid (liquid elements, some molecular compounds)
G: Gas (some gaseous elements, HOFBrINCl, some molecular compounds)

H2O (L) + N2 (G) + NaCl (S) —> HCl (aq) + NO (g)+ Na (S)