Questions from General Chemistry

Q: The following results were obtained for the determination of calcium in a

The following results were obtained for the determination of calcium in a NIST limestone sample: %CaO = 51.33, 51.22, 51.36, 51.21, and 51.44. Five gross samples were then obtained for a carload of li...

Q: Calculate the pH of a solution that is 0.0400 M

Calculate the pH of a solution that is 0.0400 M in a. NaH2PO4. b. NaHC2O4. c. NaH2PO3. d. NaHSO3. e. NaHS. f. H2NC2H4NH3 +CI-.

Q: Calculate the pH of a solution that is 0.0400 M

Calculate the pH of a solution that is 0.0400 M in a. Na3PO4. b. Na2C2O4. c. Na2HPO3. d. Na2SO3. e. Na2S. f. C2H4(NH3 1CI2)2.

Q: Calculate the pH of a solution that contains the following analytical concentrations

Calculate the pH of a solution that contains the following analytical concentrations: a. 0.0200 M in H3PO4 and 0.0500 M in NaH2PO4. b. 0.0300 M in NaH2AsO4 and 0.0500 M in Na2HAsO4. c. 0.0400 M...

Q: Calculate the pH of a solution that contains the following analytical concentrations

Calculate the pH of a solution that contains the following analytical concentrations: a. 0.225 M in H3PO4 and 0.414 M in NaH2PO4. b. 0.0670 M in Na2SO3 and 0.0315 M in NaHSO3. c. 0.640 M in HOC2H4N...

Q: Calculate the pH of a solution that is a. 0

Calculate the pH of a solution that is a. 0.0100 M in HCl and 0.0200 M in picric acid. b. 0.0100 M in HCl and 0.0320 M in benzoic acid. c. 0.0100 M in NaOH and 0.075 M in Na2CO3. d. 0.0100 M in Na...

Q: The iodide in a sample that also contained chloride was converted to

The iodide in a sample that also contained chloride was converted to iodate by treatment with an excess of bromine: The unused bromine was removed by boiling; an excess of barium ion was then added...

Q: What is the mass in grams of solute in a.

What is the mass in grams of solute in a. 250 mL of 0.264 M H2O2? b. 37.0 mL of 5.75 × 10-4 M benzoic acid (122 g/mol)? c. 2.50 L of a solution that contains 37.2 ppm of SnCl2? d. 11.7 mL of 0.0225 M...

Q: Calculate the pH of a solution that is a. 0

Calculate the pH of a solution that is a. 0.0100 M in HClO4 and 0.0300 M in monochloroacetic acid. b. 0.0100 M in HCl and 0.0150 M in H2SO4. c. 0.0100 M in NaOH and 0.0300 M in Na2S. d. 0.0100 M i...

Q: Identify the principal conjugate acid-base pair and calculate the ratio

Identify the principal conjugate acid-base pair and calculate the ratio between them in a solution that is buffered to pH 6.00 and contains a. H2SO3. b. Citric acid. c. Malonic acid. d. Tartaric a...