1
answer
0
watching
63
views
17 Nov 2019
Determine the pOH of a 0.227 M C_3H_3N solution at 25 degree C. The k_b of C_3H_5N is 1.7 time 10^-9. a) 4.59 B) 9.41 C) 10.14 D) 4.71 e) 9.29 Determine the [H_3O^+] concentration in a 0.169 M solution of the strung acid H_2SO_4. A) 2.96 times 10^-4 M B) 5.92 times 10^-4 M C) 0.338 M D) 0.169 M e) 0.208 M Calculate the pH of a solution that contains 7.8 times 10^-6 M solution of the stung acid H_2SO_4. A) 1.28 B) 5.11 C) 12.72 D) 8.89 E) 9.64 Calculate th pH of a buffer that is 0.225 M HC_2H_3O_2 and 0.162 M KC_2H_2O_2. a) 4.60 B) 9.11 C) 4.74 D) 9.26 E) 5.60 Which of the following is true? A) An effective buffer has a [base]/[acid] ratio in the range 100 - 1000. B) An acidic buffer is least resistant to pH change when [acid] = [conjugate base] C) The higher the concentration of weak acid and conjugate base, the higher the bullet capacity. D) A buffer is composed of a strong acid and a salt. E) If you know a buffer is going to become more basic time, you can increase the buffer capacity by adding extra conjugate base.
Determine the pOH of a 0.227 M C_3H_3N solution at 25 degree C. The k_b of C_3H_5N is 1.7 time 10^-9. a) 4.59 B) 9.41 C) 10.14 D) 4.71 e) 9.29 Determine the [H_3O^+] concentration in a 0.169 M solution of the strung acid H_2SO_4. A) 2.96 times 10^-4 M B) 5.92 times 10^-4 M C) 0.338 M D) 0.169 M e) 0.208 M Calculate the pH of a solution that contains 7.8 times 10^-6 M solution of the stung acid H_2SO_4. A) 1.28 B) 5.11 C) 12.72 D) 8.89 E) 9.64 Calculate th pH of a buffer that is 0.225 M HC_2H_3O_2 and 0.162 M KC_2H_2O_2. a) 4.60 B) 9.11 C) 4.74 D) 9.26 E) 5.60 Which of the following is true? A) An effective buffer has a [base]/[acid] ratio in the range 100 - 1000. B) An acidic buffer is least resistant to pH change when [acid] = [conjugate base] C) The higher the concentration of weak acid and conjugate base, the higher the bullet capacity. D) A buffer is composed of a strong acid and a salt. E) If you know a buffer is going to become more basic time, you can increase the buffer capacity by adding extra conjugate base.
Casey DurganLv2
12 May 2019