1what equation can you use when trying to find the volume or concentration of a substance?
C1V1 = C2V2
2what is the equivalent weight of calcium carbonate (CaCO3)?
50 mg/meq
3how do you find the hardness given the concentration of either magnesium or calcium (in terms of mg/L CaCO3)?
find meq of calcium/magnesium and multiply by the equivalent weight of CaCO3
4what does [H+] represent?
acid concentration
5what does [OH-] represent?
base concentration
6what is [H+]*[OH-] equal to?
10^-14
7what is pH + pOH equal to?
14
8what are pH and pOH equal to?
pH = -log[H+], pOH = -log[OH-]
9what does anoxic mean?
absence of free oxygen but presence of bound oxygen (oxygen-containing compounds)
10what does the atomic number represent?
number of protons in the nucleus of an atom
11what are isotopes?
chemically identical forms of an element with same atomic number
12for water and pure solids, what is the activity equal to?
1
13what does half life represent?
time required for the concentration to decay to half its original value
14what is henry's law?
amount of dissolved gas in a liquid is proportional to its partial pressure above the liquid
15near neutral pH, which chemical species dominates in alkalinity?
bicarbonate (HCO3-)