Textbook Question
A 1.0-L buffer solution is 0.125 M in HNO2 and 0.145 M in NaNO2. Determine the concentrations of HNO2 and NaNO2 after the addition of each substance: a. 1.5 g HCl b. 1.5 g NaOH c. 1.5 g HI
2204
views
Ch.17 - Aqueous Ionic Equilibrium
Chapter 17, Problem 62
Two 25.0-mL samples, one 0.100 M HCl and the other 0.100 M HF, are titrated with 0.200 M KOH. a. What is the volume of added base at the equivalence point for each titration?
Verified step by step guidance1
Step 1: Identify the reaction for each titration. For HCl, the reaction is HCl + KOH -> KCl + H2O. For HF, the reaction is HF + KOH -> KF + H2O.
Step 2: Calculate the moles of acid in each sample. Use the formula: moles = concentration (M) * volume (L). For both HCl and HF, moles = 0.100 M * 0.025 L.
Step 3: Determine the moles of KOH needed to reach the equivalence point. At the equivalence point, moles of KOH = moles of acid, since the reaction is a 1:1 stoichiometry.
Step 4: Calculate the volume of KOH solution required to provide the necessary moles of KOH. Use the formula: volume (L) = moles of KOH / concentration of KOH (M).
Step 5: Convert the volume of KOH from liters to milliliters by multiplying by 1000, as the final answer should be in mL.
Related Practice
Textbook Question
The graphs labeled (a) and (b) show the titration curves for two equal-volume samples of monoprotic acids, one weak and one strong. Both titrations were carried out with the same concentration of strong base.
(i) What is the approximate pH at the equivalence point of each curve?
864
views
Textbook Question
The graphs labeled (a) and (b) show the titration curves for two equal-volume samples of monoprotic acids, one weak and one strong. Both titrations were carried out with the same concentration of strong base.
(ii) Which graph corresponds to the titration of the strong acid and which one to the titration of the weak acid?
1114
views
Textbook Question
Two 25.0-mL samples, one 0.100 M HCl and the other 0.100 M HF, are titrated with 0.200 M KOH. b. Is the pH at the equivalence point for each titration acidic, basic, or neutral?
549
views
Textbook Question
Two 25.0-mL samples, one 0.100 M HCl and the other 0.100 M HF, are titrated with 0.200 M KOH. c. Which titration curve has the lower initial pH?
1062
views
Textbook Question
Two 25.0-mL samples, one 0.100 M HCl and the other 0.100 M HF, are titrated with 0.200 M KOH.
d. Sketch each titration curve.
87
views