A solution contains 0.50 M hydrocyanic acid (HCN; Ka = 6.2 × 10–10 at 25 °C) and 0.25 M sodium cyanide (NaCN) at 25 °C.
Calculate the pH of this solution. Show (or explain) your calculation.
A solution contains 0.50 M hydrocyanic acid (HCN; Ka = 6.2 × 10–10 at 25 °C)...
Calculate the volumes of 0.200 M hydrocyanic acid, HCN (Ka = 4.9 x 10–10) solution, and 0.200 M of sodium cyanide, NaCN, solution needed to prepare 100.0 mL buffer solution with pH = 9.5
A buffer solution contains 0.64 mol of hydrocyanic acid (HCN) and 0.59 mol of sodium cyanide (NaCN) in 5.10 L. The Ka of hydrocyanic acid (HCN) is Ka = 4.9e-10. (a) What is the pH of this buffer? pH = 9.345 (b) What is the pH of the buffer after the addition of 0.44 mol of NaOH? (assume no volume change) pH = (c) What is the pH of the original buffer after the addition of 0.25 mol of HI?...
A buffer solution contains 0.58 mol of hydrocyanic acid (HCN) and 0.68 mol of sodium cyanide (NaCN) in 3.00 L. The Ka of hydrocyanic acid (HCN) is Ka = 4.9e-10. (a) What is the pH of this buffer? pH = (b) What is the pH of the buffer after the addition of 0.46 mol of NaOH? (assume no volume change) pH = (c) What is the pH of the original buffer after the addition of 0.23 mol of HI? (assume...
What is the pH of a buffer system that contains 0.190 M hydrocyanic acid (HCN) and 0.280 M sodium cyanide (NaCN)? The pK_a of hydrocyanic acid is 9.31. Express your answer using two decimal places.
Calculate the concentration of cyanide (CN–) in a 0.450 M solution of hydrocyanic acid HCN and 0.10M –10 HCl. [For HCN, Ka = 6.2 × 10] a. 0.1M b. 2.8×10–9M c. 7.8×10–5M d. 1.1×10–6M e. 0.21 M with steps please
Calculate the pH of a solution that is 1.50 M in HCN (Ka = 6.2 x10-10) and 0.50 M in NaCN. A. 3.44 B. 8.73 C. 9.68 D. 9.21 E. 3.63
Hydrocyanic acid, HCN is a weak acid with a Ka of 4.9 x 10^-10. What pH would a 0.50M solution of HCN have? Calculate the Kb value for NaCN using information from the previous question.
. Calculate the concentration of cyanide (CN– ) in a 0.450 M solution of hydrocyanic acid HCN and 0.10M HCl. [For HCN, Ka = 6.2 × 10–10.]
please answer every part part 1 part 2 A buffer solution contains 0.90 mol of hydrocyanic acid (HCN) and 0.77 mol of sodium cyanide (NaCN) in 3.80 L. The K, of hydrocyanic acid (HCN) is k, = 4.9e-10. (a) What is the pH of this buffer? pH = (b) What is the pH of the buffer after the addition of 0.31 mol of NaOH? (assume no volume change) pH = (c) What is the pH of the original buffer after...
Calculate the pH of a solution that contains 3.25 M HCN (Ka = 6.2 × 10–10), 1.00 M NaOH and 1.50 MNaCN. Question 14 options: A) 8.28 B) 7.46 C) 9.25 D) 8.86 E) none of these