20.0 cm3 of a H2C2O4 solution required 8.60 cm³ of a 0.2010 M solution of sodium hydroxide for complete neutralization using phenolphthalein indicator (first permanent pink end-point). 20.0 cm3 of the same H2C2O4 solution required 7.85 cm³ of a KMnO4 solution to reach the permanent pink endpoint. Calculate the molarity of both the H2C2O4 solution and KMNO4 solution.

20.0 cm3 of a H2C2O4 solution required 8.60 cm³ of a 0.2010 M solution of sodium hydroxide for complete neutralization using phenolphthalein indicator (first permanent pink end-point). 20.0 cm3 of the same H2C2O4 solution required 7.85 cm³ of a KMnO4 solution to reach the permanent pink endpoint. Calculate the molarity of both the H2C2O4 solution and KMNO4 solution.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

2) Mohr's method uses the potassium chromate (K2CrO4) as indicator and this indicator makes the equivalent point not identical to the end point. A sample weighing 5.96 g of BaCh is dissolved in 630 mL of water. Calculate the percentage of chloride in the sample when 50 mL of the sample is titrated and requires 33.44 mL of 0.25 N AgNOs.
A Dashboard 101 Chem101 A What is the molar solubility of Ac x а ap.101edu.co Question 19 of 30 Submit What is the solubility of Mg(OH)2 at a pH of 11.40? (Ksp Mg(OH)2 is 1.6 x 10-13) M 1 4 6. C 7 8 9. +/- х 100 + 7:02 PM P Type here to search 64°F Sunny 11/7/2021 3.
One day it was discovered that the waters of the lake were dead, estimated to be polluted Hg. How do you analyze whether it is true that the cause of death of this fish is due to the presence of mercury? What you would do as an analytic see this incident. Some standard solutions with concentrations of 2 ppm, 4 ppm, 6 ppm, 8 ppm and 10 ppm have absorbants of 0.1 each; 0,3 ; 0,5 ; 0,7 ; 0.9. Determine what the concentration of the sample if analyzed has absorbants of 0.32 and and 0.025. Explain how you analyzed it. A student wants to do a laboratory practicum by bringing students. In practicum you need sulfuric acid with a concentration of 0.1 N. While in laboratory there is sulfuric acid pa with a density of 1.84 gr / ml and 96 % w / w. Explain how you took the steps so that a 0.1 N sulfuric acid solution is available during practicum
Only typed
8. If 100 mL of a 0.150 M solution of aqueous methylamine (CH3NH2) was shaken in a separating funnel with 75 mL of an organic solvent and left to separate and allow equilibrium to be established. Then only 50 mL of the aqueous layer was run off and titrated against 0.225 M hydrochloric acid with and end-point of 14.1 mL of HCI. Calculate the distribution coefficient of methylamine between water and the organic solvent and explain it's meaning?
A 150.0 mL buffer solution is 0.100 mol L-¹ in (CH3)2NH and 0.135 mol L-1 in (CH3)2NH2 Br. ▾ Part A What mass of HCI will this buffer neutralize before the pH falls below 9.75? (Kb ((CH3)2NH) = 5.40 × 10-4) Express the mass in grams to two significant figures. ΜΕ ΑΣΦ Mass= Submit Request Answer Part B Complete previous part(s) Return to Assignment Provide Feedback 1 ? g
A water has the following analysis: Cation Nat K* Ca²+ Mg2+ ST²+ mg/L 20 30 5 10 2 Anion C1- HCO CO3²- SO4- NO, 3 What is the total alkalinity and total hardness in mg/L as CaCO;? mg/L 40 67 0 5 10
Be sure to answer all parts. Find the pH during the titration of 20.00 mL of 0.1000 M butanoic acid, CH3CH2CH2COOH (к. = 1.54 x 105), with 0.1000 M NaOH solution after the following additions of titrant. (а) 10.00 mL: pH = (b) 20.10 mL: pH = (c) 29.00 mL: I. pH =
(a)A 25.0cm3 sample of a 0.1 mol/dm3 solution of ethanoic acid (ka = 1.8 x 105) was titrated with 0.1 mol/dm3 sodium hydroxide. The table below gives the names and the pH ranges for same acid/base indicators. Which of the above indicators would you use for the titration in (a) above? Explain.
Suggest how the cations in each of the following solution mixtures can be separated: Cu2+ and Mg2+
Write the charge balance and material balance(s) that are needed to determine the equilibrium solution composition for each of the following aqueous solutions: (a) 10-3 M benzoic acid (b) 10-3 M Na2S (c) 10-3 M (NH4)2CO3 (d) 10-3 M (NH4)2CO3 plus 5 × 10-3 M (NH4)3PO4 plus 10-3 M CaCO3
A 0.098 M K2Cr2O7 titrant was used for titration of 30 mL of aqueous Ethanol (C2H6O) solution and consumed 41.40 mL. (a) Calculate the mass of Ethanol and (b) determine degree proof of ethanol (density of pure ethanol= 0.789 g/mL).