CHEM 1B LAB FINAL EXAM QUESTIONS
COMPLETE WITH 100% VERIFIED
ANSWERS
\.Phenolphthalein - ANSWERS✔-An indicator that is clear in acidic solution and
pink in basic solution. Used to signal the endpoint in this experiment.
\.The formula for the hydroxide ion - ANSWERS✔-OH -1
\.Equivalence Point - ANSWERS✔-defined as the point at which the moles of H+
equals moles of OH-
\.the titrant is ......? - ANSWERS✔-solution in the buret
\.At the equivalence point, the acid-base indicator in the solution changes from
clear to pink. You should stop adding titrant when...
a.) the solution in the buret has the slightest shade of pink
b.) the solution in the flask produces a pink precipitate
c.) the solution in the flask has the slightest shade of pink
d.) the solution in the flask is the maximum shade of pink - ANSWERS✔-The
solution in the flask has the slightest shade of pink
, \.T or F
One mole of solution hydroxide will neutralize one mole of a triprotic acid -
ANSWERS✔-False
- because we would need to find out the number of moles of base needed to
titrate malonic acid.
- because it's the endpoint would be twice the # of moles on base!!!
\.T or F
All compounds containing hydrogen are acidic - ANSWERS✔-False
\.It took 32.47 mL of 0.1224 M NaOH to reach the endpoint when titrating a
sample containing 0.2372g if an unknown triprotic acid. What is the molar mass of
this acid? - ANSWERS✔-Quiz 2
\.Refer to the next following questions (10-12). substance A is red and substance B
is yellow. They form the ions A- and B-, respectively (-) both of which are colorless.
When a solution of A is mixed with a colorless solution containing B- ions, the
color changes to yellow. - ANSWERS✔-BOO
\.What are the products of the reaction?
COMPLETE WITH 100% VERIFIED
ANSWERS
\.Phenolphthalein - ANSWERS✔-An indicator that is clear in acidic solution and
pink in basic solution. Used to signal the endpoint in this experiment.
\.The formula for the hydroxide ion - ANSWERS✔-OH -1
\.Equivalence Point - ANSWERS✔-defined as the point at which the moles of H+
equals moles of OH-
\.the titrant is ......? - ANSWERS✔-solution in the buret
\.At the equivalence point, the acid-base indicator in the solution changes from
clear to pink. You should stop adding titrant when...
a.) the solution in the buret has the slightest shade of pink
b.) the solution in the flask produces a pink precipitate
c.) the solution in the flask has the slightest shade of pink
d.) the solution in the flask is the maximum shade of pink - ANSWERS✔-The
solution in the flask has the slightest shade of pink
, \.T or F
One mole of solution hydroxide will neutralize one mole of a triprotic acid -
ANSWERS✔-False
- because we would need to find out the number of moles of base needed to
titrate malonic acid.
- because it's the endpoint would be twice the # of moles on base!!!
\.T or F
All compounds containing hydrogen are acidic - ANSWERS✔-False
\.It took 32.47 mL of 0.1224 M NaOH to reach the endpoint when titrating a
sample containing 0.2372g if an unknown triprotic acid. What is the molar mass of
this acid? - ANSWERS✔-Quiz 2
\.Refer to the next following questions (10-12). substance A is red and substance B
is yellow. They form the ions A- and B-, respectively (-) both of which are colorless.
When a solution of A is mixed with a colorless solution containing B- ions, the
color changes to yellow. - ANSWERS✔-BOO
\.What are the products of the reaction?
