What is the pH of 0.050 M KCN at 25
HCN is a weak acid (Ka=6.20×10−10) , so the salt, KCN, acts as a weak base. What is the pH of a solution that is 0.0420M in KCN at 25 °C?
Find the pH of a 0.050 M HCl solution. What would be the final pH if 50.0 mL of the 0.050 M HCl solution was diluted to 250. mL?
What is the pH of a 0.4 M KCN solution? For HCN K - 4.9 * 10-10 2.54 11.46 4.85 9.71
2. What is the pH of a buffer containing 0.050 M NH3 and 0.050 M NHACI? 3. What is meant by buffer capacity? 4. Sketch a pH titration curve for the addition of 0.10 M HCl to 25.0 mL of a 0.10 M NH3 solution and indicate the "buffer zone". 4. Sketch a pH titration curve for the addition of 0.10 M HCl to 25.0 mL of a 0.10 M NHz solution and indicate the "buffer zone".
Calculate the pH and the pOH of an aqueous solution that is 0.050 M in HCl(aq) and 0.085 M in HBr(aq) at 25 °C. pH = pOH =
You are titrating 130.0 mL of 0.050 M Ca2 with 0.050 M EDTA at pH 9.00. Log K for the Ca2 EDTA complex is 10.65, and the fraction of free EDTA in the Y4-form, *. is 0.041 at pH 9.00. (a) What is Kt, the conditional formation constant, for Ca2 at pH 9.00? Number K: (pH 9.00) = 110 (b) What is the equivalence volume, Ve, in milliliters? Number mL (c) Calculate the concentration of Ca+ at V- 1/2 Ve...
PQ-25. An aqueous buffer solution contains only HCN (PK, = 9.31) and KCN and has a pH of 8.50. What can be concluded about the relative concentrations of HCN and KCN in the buffer? (A) [HCN]> [KCN] (B) [HCN]< [KCN] (C) [HCM] = [KCN] (D) nothing can be concluded about the relative concentrations
A buffer solution is 0.392 M in HCN and 0.206 M in KCN. If K, for HCN is 4.0x1010, what is the pH of this buffer solution?
Calculate the pH and the pOH of an aqueous solution that is 0.050 M in HCl(aq) and 0.060 M in HBr(aq) at 25℃.
Calculate the pH and the pOH of an aqueous solution that is 0.050 M in HCl(aq) and 0.070 M in HBr(aq) at 25°C