CHM142 Exam 3 Review 2024/2025 with Correct Answers | 2025 LATEST
UPDATED
0.0131 - (answers)In a 0.731M solution, a weak acid is 12.5% dissociated. Calculate Ka
0.02418, 0.024, 4.1x10^-13 - (answers)HF has a Ka of 6.8 x 10^-4. What are [H2O+], [F-] and
[OH-]?
11.97 - (answers)What is the pH of 0.11M diethylamine where its Kb is 8.6x10^-4?
9.1 x 10^-7 - (answers)determine the Kb of a weak base of 0.23M solution if the base has a pH
of 10.66 at 25 C
1.59 x 10^-10 - (answers)what is the Kb of the benzoate ion?
3.1 x 10^-10 - (answers)what is the Kb of the 2-hydroxylammonium ion (pKb = 4.49)
你是想要一篇“眼睛容易阅读的”
5.76 - (answers)what is the pH of 0.135M methylammonium bromide, Kb = 4.4x10^-4
中文文章，还是一篇关于“眼睛”
主题的中文文章？
8.38 - (answers)what is the pH of 0.40M NaF
acidic - (answers)is Cr(NO3)3 acidic, basic or neutral?
basic - (answers)is NaHS acidic, basic or neutral?
acidic - (answers)is Zn(CH3COO)2 acidic, basic or neutral?
Co is the base, Ni is the acid - (answers)what are the lewis acid and lewis base in the equation
4CO + Ni --> Ni(CO)4
, KCN/HCN, Na2SO4/NaHSO4 - (answers)What solution can act as a buffer solution?
KCN/HCN
Na2SO4/NaHSO4
NH3/NH4NO3
NaI/HI
10.4 - (answers)Find the pH of a buffer than consists of 0.34M CH3NH2 and 0.58M CH3NH3Cl
(pKb of CH3NH2 = 3.35)
Ka2, 7.5 - (answers)A buffer consists of 0.16M NaH2PO4 and 0.32M Na2HPO4. Phosphoric
acid is a triprotic acid (Ka1 = 7.2 x 10^-3, Ka2 = 6.3 x 10^-8, Ka3 = 4.2 x 1-^-13). Which buffer
is most important? What is the buffer pH?
4.3 - (answers)what is the correct concentration ratio of [CH3COO-]/[CH3COOH] of a buffer
solution that has a pH of 5.37 (Ka = 1.8 x 10^-5)
9.18 - (answers)A buffer that contains a 0.491M base, B, and 0.297M of its conjugate acid, BH+,
has a pH of 9.14. What is the你是想要一篇“眼睛容易阅读的”
pH after 0.00200mol HCl is added to 0.250L of solution
中文文章，还是一篇关于“眼睛”
主题的中文文章？
10.20 - (answers)A buffer is prepared by mixing 50.0mL of 0.050M sodium bicarbonate and
10.7ml of 0.10M NaOH (Ka = 4.7 x 10^-11)
12.79, 10.90, 1.928 - (answers)calculate the pH during the titration of 30.00ml of 0.1000M KOH
and 0.1000M HBR solution after the following additions of acid:
- 7.00ml
- 29.50ml
- 38.00ml
HBrO < HClO < HBr - (answers)Arrange the following acids HClO, HBrO, and HBr in order of
increasing strength (weakest to strongest).
UPDATED
0.0131 - (answers)In a 0.731M solution, a weak acid is 12.5% dissociated. Calculate Ka
0.02418, 0.024, 4.1x10^-13 - (answers)HF has a Ka of 6.8 x 10^-4. What are [H2O+], [F-] and
[OH-]?
11.97 - (answers)What is the pH of 0.11M diethylamine where its Kb is 8.6x10^-4?
9.1 x 10^-7 - (answers)determine the Kb of a weak base of 0.23M solution if the base has a pH
of 10.66 at 25 C
1.59 x 10^-10 - (answers)what is the Kb of the benzoate ion?
3.1 x 10^-10 - (answers)what is the Kb of the 2-hydroxylammonium ion (pKb = 4.49)
你是想要一篇“眼睛容易阅读的”
5.76 - (answers)what is the pH of 0.135M methylammonium bromide, Kb = 4.4x10^-4
中文文章，还是一篇关于“眼睛”
主题的中文文章？
8.38 - (answers)what is the pH of 0.40M NaF
acidic - (answers)is Cr(NO3)3 acidic, basic or neutral?
basic - (answers)is NaHS acidic, basic or neutral?
acidic - (answers)is Zn(CH3COO)2 acidic, basic or neutral?
Co is the base, Ni is the acid - (answers)what are the lewis acid and lewis base in the equation
4CO + Ni --> Ni(CO)4
, KCN/HCN, Na2SO4/NaHSO4 - (answers)What solution can act as a buffer solution?
KCN/HCN
Na2SO4/NaHSO4
NH3/NH4NO3
NaI/HI
10.4 - (answers)Find the pH of a buffer than consists of 0.34M CH3NH2 and 0.58M CH3NH3Cl
(pKb of CH3NH2 = 3.35)
Ka2, 7.5 - (answers)A buffer consists of 0.16M NaH2PO4 and 0.32M Na2HPO4. Phosphoric
acid is a triprotic acid (Ka1 = 7.2 x 10^-3, Ka2 = 6.3 x 10^-8, Ka3 = 4.2 x 1-^-13). Which buffer
is most important? What is the buffer pH?
4.3 - (answers)what is the correct concentration ratio of [CH3COO-]/[CH3COOH] of a buffer
solution that has a pH of 5.37 (Ka = 1.8 x 10^-5)
9.18 - (answers)A buffer that contains a 0.491M base, B, and 0.297M of its conjugate acid, BH+,
has a pH of 9.14. What is the你是想要一篇“眼睛容易阅读的”
pH after 0.00200mol HCl is added to 0.250L of solution
中文文章，还是一篇关于“眼睛”
主题的中文文章？
10.20 - (answers)A buffer is prepared by mixing 50.0mL of 0.050M sodium bicarbonate and
10.7ml of 0.10M NaOH (Ka = 4.7 x 10^-11)
12.79, 10.90, 1.928 - (answers)calculate the pH during the titration of 30.00ml of 0.1000M KOH
and 0.1000M HBR solution after the following additions of acid:
- 7.00ml
- 29.50ml
- 38.00ml
HBrO < HClO < HBr - (answers)Arrange the following acids HClO, HBrO, and HBr in order of
increasing strength (weakest to strongest).
