CE 341 - EXAM 2 QUESTIONS & ANSWERS (GRADED A+)

CE 341 - EXAM 2 QUESTIONS &
ANSWERS (GRADED A+)

Hydroxyapatite - ANSWERCa10(PO4)6(OH)2
-similar to mineral components of bones/hard tissues in mammals

stoichiometric coefficients - ANSWERnumeric values placed in front of a chemical
species in a balanced reaction

rules for balancing chemical rxns - ANSWER1) each type of atom must have the
same number of atoms on each side of equation
2) overall charge on reactant side of reaction must equal charge on product side

charge balance - ANSWER-electroneutrality must be maintained
-moles of positive charge = moles of negative charge

acid/base reactions - ANSWER-acid1 + base2 <--> acid2 + base1
-acid1 + base1 = acid/conjugate base pair

acid - ANSWER-H+ donor

base - ANSWER-H+ acceptor

strong acid - ANSWERwants to disassociate in water

weak acid - ANSWERwants to stay together

redox reaction - ANSWERox1 + red2 <--> ox2 + red1
-ox1 and red1 are a redox couple

redox pair - ANSWERany pair of species containing the same element in a different
oxidation state
ex. Fe2+, Fe3+
example of redox chemistry = disinfection

strong oxidants - ANSWERcause the oxidation of other compounds
ex. chlorine and ozone

rules for oxidation states - ANSWER1) oxidation state of monoatomic ion = Fe2+
2) hydrogen has a +1
3) oxygen never has a BLANK
4) oxidation state of free element is 0, Fe^0, O2
5) sum of oxidation states