. The half-reactions for Part I of the experiment are:C₂042molarity→ CO₂ (acid) and MnO4¹ Mn2 (acid)->Find the normality of the KMnO4 solution for each standardization trial andMejorityfind the average normality. Part A: Standardization of Potassium Permanganate, KMnO4 SolutionYour Data Group IGroup IIGroup IIIMass of Na2C2O4 used0.23 90.30 g0.22g0249Initial buret readingOm L3 mL0 mL0 mLFinal buret reading36.6 mL 28 mL31.3mL51.1mLVolume of KMnO4 used36.6 mL50 mL31.3 mL51.1mL25+25

The calculations are done using the stoichiometric ratios concept. First, the accurate…

Answered: . The half-reactions for Part I of the…

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

Chapter11: Properties Of Solutions

Section: Chapter Questions

Problem 117AE: Patients undergoing an upper gastrointestinal tract laboratory test are typically given an X-ray...

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Caffeine is made up of 49.5% C, 5.2% H, 16.5% O, and 28.9% N. A solution made up of 8.25 g of caffeine and 100.0 mL of benzene (d=0.877g/mL) freezes at 3.03C. Pure benzene (k f =5.10C/m) freezes at 5.500C. What are the simplest and molecular formulas for caffeine?
Specifications for lactated Ringers solution, which is used for intravenous (IV) injections, are as follows to reach 100. mL of solution: 285315 mg Na+ 14.117.3 mg K+ 4.9Q.O mg Ca2+ 368408 mg Cl 231261 mg lactate, C3H5O3 a. Specify the amount of NaCl, KCl, CaCl2 2H2O, and NaC3H5O3 needed to prepare 100. mL lactated Ringers solution. b. What is the range of the osmotic pressure of the solution at 37C, given the preceding specifications?
In lab you need to prepare at least 100 mL of each of the following solutions. Explain how you would proceed using the given information. a. 2.0 m KCl in water (density of H2O = 1.00 g/cm3) b. 15% NaOH by mass in water (d = 1.00 g/cm3) c. 25% NaOH by mass in CH3OH (d = 0.79 g/cm3) d. 0.10 mole fraction of C6H12O6 in water (d = 1.00 g/cm3)
You need 300. mL of 0.500-M K2Cr2O7. Which method is best to prepare this solution? Explain your choice. (a) Dilute 250. mL of 0.600-M K2Cr2O7 to 300. mL. (b) Add 50.0 mL water to 250. mL of 0.250-M K2Cr2O7. (c) Dilute 125 mL of 1.00-M K2Cr2O7 to 300. mL. (d) Add 30.0 mL of 1.50-M K2Cr2O7 to 270. mL of water.
A martini, weighing about 5.0 oz (142 g), contains 30.0% by mass of alcohol. About 15% of the alcohol in the martini passes directly into the bloodstream (7.0 L for an adult). Estimate the concentration of alcohol in the blood (g/cm3) of a person who drinks two martinis before dinner. (A concentration of 0.00080 g/cm3 or more is frequently considered indicative of intoxication in a normal adult.)
A pharmacist prepares an isotonic saline solution for intravenous infusion. Instead of preparing a 0.15 M solution, a 1.5 M solution is prepared. What would happen to the red blood cells if this erroneously prepared solution is infused?
Using Figure 3.1, determine a. the number of grams of CuSO45H2O that will dissolve in 100g of H2O at 100C. gCuSO45H2O b. the number of grams of water required to dissolve 4.0g of CuSO45H2O at 100C. Hint: your answer to Problem 1a gives you the needed conversion factor for g CuSO45H2O to gH2O. gH2O c. the number of grams of water required to dissolve 18gKNO3 at 100C. gH2O d. the number of grams of water required to dissolve a mixture containing 18gKNO3 and 4.0g CuSO45H2O, assuming that the solubility of one substance is not affected by the presence of another. gH2O
6-21 Are mixtures of gases true solutions or heterogeneous mixtures? Explain.
Calculate the enthalpies of solution for Li2SO4 and K2SO4. Are the solution processes exothermic or endothermic? Compare them with LiCl and KCl. What similarities or differences do you find?
The Henry's law constant for the solubility of argon gas in water is 1.0103M/atm at 30C. (a) Express the constant in M/mm Hg. (b) If the partial pressure of argon gas at 30C is 693 mm Hg, what is the concentration (in M) of the dissolved argon gas at 30C? (c) How many grams of argon gas can be dissolved in 29 L of water at 693 mm Hg and 30C? (Ignore the partial pressure of water.)
A water solution of sodium hypochlorite (NaOCl) is used as laundry bleach. The concentration of sodium hypochlorite is 0.75 m. Express this concentration as a mole fraction.
When 79.3 g of a particular compound is dissolved in 0.878 kg of water at 1 atm pressure, the solution freezes at 1.34C. If the compound docs not undergo ionization in solution and is nonvolatile, determine the molecular weight of the compound.

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