Question 1 for data analysis were obtained as shown. Complete the following table. (See Report Sheet.) Record calculated values with theadjusted to a pH that is basic. The precipitate, after having been filtered, was air-dried and weighed. Data for Tri:4. a. A sample of a CaCl,-2H,O/K,C,O,'H,O solid salt mixture is dissolved in -150 mL of deionized water previoutaprect number of significant figures.A. Precipitation of CaC,O,'H,O from theCalculation ZoneSalt Mixture3. Mass of salt mixture (g)4. Mass of filter paper (g)o 0.879Data Analysis, 1.1.8965. Mass of filter paper and CaC,O,•H¿O (g)6. Mass of air-dried CaC,O,•H,O (g)2.180B. Determination of Limiting ReactantData Analysis, 3.1. Limiting reactant in salt mixtureCaCl,^2H,O2. Excess reactant in salt mixturenigabimilData Analysis e1. Moles of CaC,O,'H,O precipitated (mol)Data Analysis, 4.Show calculation.2. Moles of limiting reactant in salt mixture (mol)L See equation 8.1.3. Mass of limiting reactant in salt mixture (g)ArotawData Analysis, 5.Show calculation.4. Mass of excess reactant in salt mixture (g)Equals mass of salt mixture minus mass of limiting reactant.Show calculation.5. Percent limiting reactant in salt mixture (%)Show calculation.6. Percent excess reactant in salt mixture (%)20 70 ond 29 407

The insoluble mass that is obtained by combining two or more solutions of an ionic compound is known…

Answered: Data Analysis R b sostaum gabimila 1.…

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter15: Acid–base Equilibria

Section: Chapter Questions

Problem 99AP

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enumerate the steps necessary to create a Phosphate Buffer NaH2PO4 - K2HPO4 with a final volume of 500 mL, a concentration of 0.10M, and a pH of 7.20 using 0.20 M NaH2PO4 and solid K2HPO4. Nota bene: Ka equals 6.3 x 10-8. (show computation as well) For solid K2HPO4, calculate for the mass (based from calculated moles of salt) rather than the volume since this is a solid substance.
In the experiment, we used titration to determine the total acid content ofsamples, which we reported in terms of molarity. Reporting acidity through pHmeasurements is quite different, in that we can only measure the amount of theacid in its ionized form. You were tasked to investigate a clear aqueous solutionof an unknown monoprotic acid. You decided to use two methods togather data.Method 1 – TITRATION: A 10. mL aliquot of the sample was diluted with 25 mLdistilled water. Two drops of phenolphthalein were added and then it was titrated3.54 mL of 0.048 M standardized NaOH to the endpoint.Method 2 – pH STRIP: You took 1 mL of the sample and used a pH strip toestimate the pH, which turned out to be around 3.3. Another 1 mL of the samplewas diluted with 9 mL of water. The pH was taken again and is now around 3.8.a) Calculate the molarity of the acid using the titration data.b) If we assume that the titrated unknown is a strong acid, predict thepH of the sample.c) Using pH strip results,…
How can we answer these questions? 1) What other methods could you have used to identify the unknown chemical? 2). What is/are the dominant species in solution at pH = 4.4? 3) Does the solution at pH = 4.9 constitute a buffer? What about at pH- 5.9? Explain
Prepared buffer solution GivenAmmonia Volume = 68 mL | Ammonia Concentration = 0.17 MAmmonium Chloride Volume = 42 mL | Ammonium Chloride Concentration = 0.13 MDissociation Constant of Ammonia: 1.8x10-5What is the total vol. of buffer
Using 0.1 M phosphate buffer, pH 7.2, prepare 25mL eachof the buffer solutions with the following concentrations at pH 7.2:1. 0.005 M2. 0.05 M3. 0.10 M
why we use methyl orange as indicator in titration of strong base with weak base and not the phenolphthalein

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Data Analysis R b sostaum gabimila 1. Moles of CaC,O,-H,0 precipitated (mol) Data Analysis, 4. Show calculation.