Chem 2 Lab Final Exam Questions and
All Solved Solutions.
What were the contact hazards in the Weak Organic Acid lab? - Answer Several of the
corrosive acid unknowns and NaOH (dangerous to eyes)
What was the purpose of the Weak Organic Acid lab? - Answer To identify a weak acid by
finding its equivalent weight and dissociation constant
What instrument were you introduced to in the Weak Organic Acid lab? - Answer The pH
meter
True or False: All the acids in the Weak Organic Acid lab were monoprotic acids, meaning the
equivalent weight and molar mass of the acids are the same. - Answer True
What is the equilibrium constant for the equation in the Weak Organic Acid lab? - Answer Ka
= [H3O]+[A]-/[HA]
In the Weak Organic Acid lab, what ion acts as a spectator ion? - Answer Sodium ion
True or False: At the halfway point, Ka = [H3O+]. - Answer True
True or False: At the halfway point, pKa = pH. - Answer True
True or False: A titration is a neutralization reaction. - Answer True
What was the indicator used in the Weak Organic Acid lab? - Answer Phenolphthalein
True or False: At the equivalence point, the moles of acid are not equal to moles of base. -
Answer False, they are equal.
What are weak acids? - Answer Acids that do not ionize completely
Ionization depends on the the acid ___________ and acid ____________ constant. - Answer
concentration, equilibrium
, While using the balance in part 1 of the Weak Organic Acid Lab, the mass is recorded ________
decimal places. - Answer three
You should always read a buret _______ decimal places. - Answer Two
True or False: You should always add water to acid. - Answer False! You should add acid to
water
What solutions are extremely corrosive in the Quantitative Analysis lab? - Answer
Concentrated solutions of acids and bases
What solution is extremely flammable in the Quantitative Analysis lab? - Answer DMG
In the Quantitative Analysis lab, which cations belong in Group 1 - Insoluble Chlorides? - Answer
Ag+ and Hg2+
In the Quantitative Analysis lab, which cations belong in Group 2 - Insoluble Hydroxides? -
Answer Fe3+ and Mn 2+
In the Quantitative Analysis lab, which cations belong in Group 3 - Complexed Ammines? -
Answer Cu2+ and Ni 2+
True or False: Classifying metal ions into groups enhance their separation and characterization. -
Answer True
What is the classification of ions based upon? - Answer Similar chemical properties, such as
solubility and the ability to form complex ions
True or False: Most metal chlorides are soluble. - Answer True
True or False: While most metal chlorides are soluble, Ag+ and Hg 2+ (The insoluble chlorides)
are not. - Answer True
Mercury (I) exists as a _______. - Answer dimer
All of the Group I cations form insoluble chlorides in the presence of dilute ______. - Answer
HCl
All Solved Solutions.
What were the contact hazards in the Weak Organic Acid lab? - Answer Several of the
corrosive acid unknowns and NaOH (dangerous to eyes)
What was the purpose of the Weak Organic Acid lab? - Answer To identify a weak acid by
finding its equivalent weight and dissociation constant
What instrument were you introduced to in the Weak Organic Acid lab? - Answer The pH
meter
True or False: All the acids in the Weak Organic Acid lab were monoprotic acids, meaning the
equivalent weight and molar mass of the acids are the same. - Answer True
What is the equilibrium constant for the equation in the Weak Organic Acid lab? - Answer Ka
= [H3O]+[A]-/[HA]
In the Weak Organic Acid lab, what ion acts as a spectator ion? - Answer Sodium ion
True or False: At the halfway point, Ka = [H3O+]. - Answer True
True or False: At the halfway point, pKa = pH. - Answer True
True or False: A titration is a neutralization reaction. - Answer True
What was the indicator used in the Weak Organic Acid lab? - Answer Phenolphthalein
True or False: At the equivalence point, the moles of acid are not equal to moles of base. -
Answer False, they are equal.
What are weak acids? - Answer Acids that do not ionize completely
Ionization depends on the the acid ___________ and acid ____________ constant. - Answer
concentration, equilibrium
, While using the balance in part 1 of the Weak Organic Acid Lab, the mass is recorded ________
decimal places. - Answer three
You should always read a buret _______ decimal places. - Answer Two
True or False: You should always add water to acid. - Answer False! You should add acid to
water
What solutions are extremely corrosive in the Quantitative Analysis lab? - Answer
Concentrated solutions of acids and bases
What solution is extremely flammable in the Quantitative Analysis lab? - Answer DMG
In the Quantitative Analysis lab, which cations belong in Group 1 - Insoluble Chlorides? - Answer
Ag+ and Hg2+
In the Quantitative Analysis lab, which cations belong in Group 2 - Insoluble Hydroxides? -
Answer Fe3+ and Mn 2+
In the Quantitative Analysis lab, which cations belong in Group 3 - Complexed Ammines? -
Answer Cu2+ and Ni 2+
True or False: Classifying metal ions into groups enhance their separation and characterization. -
Answer True
What is the classification of ions based upon? - Answer Similar chemical properties, such as
solubility and the ability to form complex ions
True or False: Most metal chlorides are soluble. - Answer True
True or False: While most metal chlorides are soluble, Ag+ and Hg 2+ (The insoluble chlorides)
are not. - Answer True
Mercury (I) exists as a _______. - Answer dimer
All of the Group I cations form insoluble chlorides in the presence of dilute ______. - Answer
HCl
