Chem 1211 Final Exam Questions With Correct Answers

Chem 1211 Final Exam Questions With Correct
Answers

intensive |property |- |CORRECT |ANSWER✔✔-does |NOT |depend |on |amount |of |substance |(ex: |
temp, |melting |point)



extensive |property |- |CORRECT |ANSWER✔✔-depends |on |the |sample |size |(ex: |length, |volume)



converting |from |Celsius |to |Kelvin |- |CORRECT |ANSWER✔✔-C |+ |273



accuracy |- |CORRECT |ANSWER✔✔-how |close |something |is |to |the |true |value



precision |- |CORRECT |ANSWER✔✔-how |well |results |agree |with |each |other



law |of |definite |proportions |- |CORRECT |ANSWER✔✔-different |samples |of |a |pure |chemical |
compound |always |contain |the |same |proportion |of |elements |by |mass



law |of |multiple |proportions |- |CORRECT |ANSWER✔✔-elements |can |combine |in |different |ways |
to |form |different |chemical |compounds, |with |mass |rations |that |are |small |whole |number |
multiples |of |each |other



atomic |number |- |CORRECT |ANSWER✔✔-number |of |protons |in |the |nuclei |of |atoms |of |each |
element



mass |number |- |CORRECT |ANSWER✔✔-sum |of |the |number |of |protons |and |neutrons |in |an |
atom

,Avogadro's |number |- |CORRECT |ANSWER✔✔-6.022 |x |10^-23 |atoms



solution |- |CORRECT |ANSWER✔✔-a |homogeneous |mixture |of |substances



solvent |- |CORRECT |ANSWER✔✔-the |major |component |of |a |solution



solute |- |CORRECT |ANSWER✔✔-the |minor |component |that |gets |mixed |homogeneously |with |
the |solvent



dilution |- |CORRECT |ANSWER✔✔-reducing |the |concentration |of |a |solution |by |adding |more |
solvent



empirical |formula |- |CORRECT |ANSWER✔✔-tells |the |smallest |whole |number |ratios |of |atoms |in |
a |compound



molecular |formula |- |CORRECT |ANSWER✔✔-tells |the |actual |numbers |of |atoms |in |a |molecule, |
can |be |either |the |same |as |the |empirical |formula |or |a |multiple |of |it

to |find |the |multiple: |(molec. |mass)/(empirical |formula |mass)



redox |reaction |- |CORRECT |ANSWER✔✔-when |one |or |more |electrons |are |transferred |between |
reaction |partners; |as |a |result, |the |charges |on |atoms |in |the |reactants |change



electrolytes |- |CORRECT |ANSWER✔✔-substances |that |dissolve |in |water |to |produce |conducting |
solutions |of |ions



net |ionic |equation |- |CORRECT |ANSWER✔✔-equation |that |shows |only |the |ions |undergoing |
change |in |the |reactions

, solubility |rules |- |CORRECT |ANSWER✔✔-1. |Compound |is |probably |soluble |if |it |has |the |cations:

-Li+ |,Na+, |K+, |Rb+, |Cs+ |(group |1), |NH4+

-all |ionic |compounds |with |an |alkali |metal |or |ammonium

2. |probably |soluble |if |it |has |the |anions:

-Cl- |, |Br-, |I-, |(Halides) |except |with |Ag+, |Hg2 |2+, |Pb |2+

- |NO3- |, |ClO4- |, |CH3CO2- |, |SO4 |2- |(except |with |Sr |2+, |Ba |2+, |Hg2 |2+, |Pb |2+



Arrhenius |acid |- |CORRECT |ANSWER✔✔-substance |that |dissociates |in |water |to |give |H+ |ions



Arrhenius |base |- |CORRECT |ANSWER✔✔-substance |that |dissociates |in |water |to |give |OH- |ions



polyprotic |acid |- |CORRECT |ANSWER✔✔-an |acid |that |can |donate |more |than |one |H+ |ion



oxidation |- |CORRECT |ANSWER✔✔-loss |of |one |or |more |electrons |by |a |substance



reduction |- |CORRECT |ANSWER✔✔-gain |of |one |or |more |electron



reducing |agent |- |CORRECT |ANSWER✔✔-causes |reduction |(is |oxidized |and |oxidation |# |
increases)



oxidizing |agent |- |CORRECT |ANSWER✔✔-causes |oxidation |(is |reduced |and |oxidation |# |
decreases)



Steps |to |balance |a |redox |reaction |(half-rxn) |- |CORRECT |ANSWER✔✔-1. |write |UNBALANCED |
ionic |equation

2. |split |into |2 |half |reactions, |(oxidation |and |reduction)

3. |balance |everything |except |for |the |oxygens |and |hydrogens