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83 solutions

Weak Acids

Q. Find [H+] and pH of an aqueous solution at 25C that is 0.86 M in HCN and 1.12 M in Ba(CN)2. For HCN, Ka = 4.9x10^-10 at 25 C. (You are not allowed to use the Henderson-Hasselbalch equation)

Solved • Aug 17, 2019

Weak Acids

Q. Calculate the formate ion concentration and pH of a solution that is 0.050 M in formic acid (HCOOH; Ka= 1.8 × 10−4) and 0.10 M in HNO3.

Solved • Aug 3, 2019

Weak Acids

Q. Where did H30+ come from ?

Solved • Aug 2, 2019

Weak Acids

Q. What is the starting concentration (M) of solution (aq, 25 C) of benzoic acid, C6H5COOH, whose pH =3.26? Ka= 6.3 x 10-5

Solved • Jul 28, 2019

Weak Acids

Q. For a solution of the weak acid HCN (aq) state whether H3O+ (aq) concentration will increase, decrease or stay the same we add NaCn, KCL,HCN, (There is no volume change

Solved • Jul 28, 2019

Weak Acids

Q. Can you explain this also I don’t understand how it the products became H30+ and C2H302- Calculate the pH value of 0.20 M solution of acetic acid at 25 C. Ka = 1.8x10^-5 at 25 C

Solved • Jul 27, 2019

Weak Acids

Q. Calculate the degree of ionization of acetic acid in solution 3. The degree of ionization of an acid = [H3O+]/[HA] where [H3O+] is the equilibrium concentration and [HA] is the original concentration of of the acid . [H3O+] can be determined from the measured pH. Solution 3. 10mL of 0.1 M HC2H3O2 + 90.0 mL of H2O Measured pH 3.51. To determine the [H3O+] account for the dilution effect of adding 90.0 mL of water , and use M1V1=M2V2

Solved • Jul 24, 2019