CHEM 103 FINAL EXAM
% by mass - correct answer-%(m/m) = mass of solute/ mass of solution x 100
% by volume - correct answer-%(v/v)= volume of solute/volume of solution x 100
% mass-volume - correct answer-%(m/v)= mass of solute/ volume of solution x100
1.00 atm equals ...... - correct answer-1 torr
14.7 psi - correct answer-1.00 atm equals ....
5 types of reactions - correct answer-combustion
composition
decomposition
single replacement
double replacement
760 mmHg equals .... - correct answer-1.00 atm
accuracy - correct answer-refers to the correctness of measurement data
acid base indicator - correct answer-a compound that exhibits different colors depending on
the pH of its solution
acid ionization constant - correct answer-Ka - an equilibrium constant for the ionization of an
acid in aqueous solution to H+ and its conjugate base
Ka = H+ A-/ HA
Acid strength increases as the magnitude of Ka increases
acid properties - correct answer-1. substances that ionize when added to water
2. acids react with metal that are chemically active to produce H2
3. acids affect the colors of acid-base indicators
4. acids neutralize bases
5. dilute acids have a sour taste
ALWAYS ADD ACID TO WATER
acid-base titration - correct answer-when a known acid or base is added to an unknown
base or acid until it reaches its end point. This uses a standard solution to determine the
concentration of another solution (molarity). It is a form of volumetric analysis
acid to base or base to acid
acidic salt - correct answer-salt of strong acid and weak base. It is basic in water
,acidic solution - correct answer-H+ > OH-
activation energy - correct answer-min. amount of kinetic energy needed for the collision of
reactant particles to result in a chemical reaction.
alkali metals - correct answer-group 1A
alpha decay - correct answer-radioactive nucleus emits an alpha particle, a new nucleus
results
the mass number of the new nucleus is 4 less than that of the initial nucleus
the atomic number is decreased by 2
amorphous solid - correct answer-atoms have no set pattern and arranged randomly
EX. Glass
amphiprotic - correct answer-substance that can act as either an acid or base
anhydrous - correct answer-hydrated crystal with water removed
aqueous solution - correct answer-water is the solvent
arrhenius acid - correct answer-in water produces H+
arrhenius base - correct answer-in water produces OH+
atom - correct answer-smallest part of an element that contains 3 subatomic particles
atomic mass number - correct answer-protons plus neutrons
atomic number - correct answer-number of protons in atom
Avogadro's Law - correct answer-equal volumes of gases at the same temperature and
pressure contain the same number of molecules
background radiation - correct answer-radiation that comes form natural sources to which
living organisms are exposed on a continuing basis
balancing nuclear equations - correct answer-in a balanced nuclear equation, the sum of the
mass numbers and the sum of the atomic numbers for the nuclei of the reactant and the
products must be equal
barometer - correct answer-device that measures atm pressure
, base - correct answer-puts OH1- into solution instead of H1+ like an acid
base properties - correct answer-1. bases are electrolytes
2. bases cause indicators to turn a characteristic color
3. bases neutralize acids
4. water solutions of bases taste bitter and feel slippery
5. bases emulsify fats and oils
bases in household products - correct answer-used to clean, remove grease, and to open
drains
weak bases: window cleaner - NH3
bleach - NaOCl
laundry detergent - Na2CO3, Na3PO4
toothpaste and baking soda - NaHCO3
baking powder, scouring powder, Na2CO3
lime for lawns and agriculture, CaCO3
laxatives and antacids, MgOH2, AlOH3
strong bases: drain cleaner or oven cleaner, NaOH
basic salt - correct answer-salt of a weak acid and strong base. Basic salt is acidic in water
basic solution - correct answer-H+ < OH-
beta decay - correct answer-an electron emitted from the nucleus
forms when a neutron in the nucleus breaks down
binary compound - correct answer-compounds in which 2 elements are present , metal and
non metal - nonmetal changes to ide
binary molecule - correct answer-1st word : prefix and full name
2nd word : prefix and stem and ide
blue litmus paper - correct answer-will turn red in an acid solution
boiling point - correct answer-the temperature at which the vapor pressure of a liquid
becomes equal to the atmospheric pressure exerted on the liquid
boiling point elevation - correct answer-the presence of a non volatile solute in a pure liquid
solvent raises the boiling point of the solvent
bond polarity - correct answer-measure of the degree of in equality in sharing of electrons
between 2 atoms in a chemical bond
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