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A 5.9957 g sample of Na, CrO, (MW = 161.97 g/mol) is dissolved in 1000.0 mL...
5.3307 g of Na2CrO4 (MW 161.97 g/mol) is dissolved in 1000.0 mL of water. Assuming the...
5.3307 g of Na2CrO4 (MW 161.97 g/mol) is dissolved in 1000.0 mL of water. Assuming the solution has a density of 1.00 g/mL, what is the concentration of Na (MW 22.9898 g/mol) in the solution in units of a) molarity (M)? Number b) parts per thousand (ppt)? Number ppt c) 25.0 mL of the solution is then diluted to a final volume of 500.0 mL. What is the concentration of Na* in the diluted solution in units of parts per...
A 5.0067 g sample of Na2CrO4 (MW = 161.97 g/mol) is dissolved in 250.0 mL of...
A 5.0067 g sample of Na2CrO4 (MW = 161.97 g/mol) is dissolved in 250.0 mL of water. Assume the solution has a density of 1.00 g/mL. A 50.0 mL aliquot of the solution is then diluted to a final volume of 250.0 mL. What is the concentration of Na+ in the diluted solution in units of parts per million (ppm)?
A 6.04 g sample of a solid containing Ni is dissolved in 20.0 mL water. A...
A 6.04 g sample of a solid containing Ni is dissolved in 20.0 mL water. A 5.00 mL aliquot of this solution is diluted to 100.0 mL and analyzed in the lab. The analyzed solution was determined to contain 6.88 ppm Ni . Determine the molar concentration of Ni in the 20.0 mL solution. *concentration= ? M Determine the mass, in grams, of Ni in the original sample. *mass= ? g Determine the weight percent of Ni in the sample....
Chromel is an alloy composed of nickel, iron, and chromium. A 0.6445-g sample was dissolved and...
Chromel is an alloy composed of nickel, iron, and chromium. A 0.6445-g sample was dissolved and diluted to 250.0 mL. When a 50.00-mL aliquot of 0.05173 M EDTA was mixed with an equal volume of the diluted sample, all three ions were chelated, and a 5.23-mL back-titration with 0.06139 M copper(II) was required. The chromium in a second 50.0-mL aliquot was masked through the addition of hexamethylenetetramine; titration of the Fe and Ni required 38.95 mL of 0.05173 M EDTA....
0.3926 g of salicylic acid is dissolved in water and made up to 250.0 mL in a volumetric flask. Then, 4.00 mL of th...
0.3926 g of salicylic acid is dissolved in water and made up to 250.0 mL in a volumetric flask. Then, 4.00 mL of this solution is pipetted into a 50.0 mL volumetric flask and diluted with water to the mark. What is the final salicylic acid concentration?
0.3856 g of salicylic acid is dissolved in water and made up to 250.0 mL in a volumetric flask. Then, 3.00 mL of th...
0.3856 g of salicylic acid is dissolved in water and made up to 250.0 mL in a volumetric flask. Then, 3.00 mL of this solution is pipetted into a 50.0 mL volumetric flask and diluted with water to the mark. What is the final salicylic acid concentration?
7. A 0.653 g of a monoprotic solid acid (mw= 157 g/mol) is dissolved in water...
7. A 0.653 g of a monoprotic solid acid (mw= 157 g/mol) is dissolved in water to produce a 50.0 mL solution. The pH of this solution is measure to be pH = 2.13. Determine the ionization constant (Ka) of the acid. 8. A buffer is 0.50 M CH3COOH(aq) and 0.50 M Na(C6H-C00) (aq). For CH2COOH pKa = 4.20 a) Calculate the pH of the buffer solution. b) Calculate the pH after the addition of 40 mL of a 0.150...
A student dissolves 0.2062 g of caffeine (MW: 194.19 g/mol) into 50.00 mL of deionized water....
A student dissolves 0.2062 g of caffeine (MW: 194.19 g/mol) into 50.00 mL of deionized water. What is the concentration of the caffeine in the solution in ppm (parts per million)? A student performs a spectrophotometric analysis using external calibration and obtains a linear relationship with a slope of 0.0550 and a y-intercept of 0.011. In order to analyze an unknown solution, the student dilutes 10.00 mL of the unknown solution to 50.00 mL. If the absorbance of the dilute...
If 0.4575 g of CaCO3 were dissolved and diluted in a 300.00 mL volumetric flask (assume...
If 0.4575 g of CaCO3 were dissolved and diluted in a 300.00 mL volumetric flask (assume the density of the solution is 1.00 g/mL), what would the calcium (Ca2+) concentration be in a) molarity and b)ppm?
1. A l64-g sample of HF is dissolved in water to give 2.0 x 10' ml...
1. A l64-g sample of HF is dissolved in water to give 2.0 x 10' ml of solution. The concentration of solution is: A) 0.82 M B) 0.16 M C) 0.08 M D) 4.1 M E) 8.2 M 2. You have 75.0 mL of a 2.50 M solution of Na,CrO(ag). You also have 125 mL of a 2.01 M solution of AgNOs(ag), Calculate the concentration of Cro. after the two solutions are mixed together. A) 0.00 M B) 0.309 M...
5.3307 g of Na2CrO4 (MW 161.97 g/mol) is dissolved in 1000.0 mL of water. Assuming the solution has a density of 1.00 g/mL, what is the concentration of Na (MW 22.9898 g/mol) in the solution in units of a) molarity (M)? Number b) parts per thousand (ppt)? Number ppt c) 25.0 mL of the solution is then diluted to a final volume of 500.0 mL. What is the concentration of Na* in the diluted solution in units of parts per...
0.3926 g of salicylic acid is dissolved in water and made up to 250.0 mL in a volumetric flask. Then, 4.00 mL of this solution is pipetted into a 50.0 mL volumetric flask and diluted with water to the mark. What is the final salicylic acid concentration?
0.3856 g of salicylic acid is dissolved in water and made up to 250.0 mL in a volumetric flask. Then, 3.00 mL of this solution is pipetted into a 50.0 mL volumetric flask and diluted with water to the mark. What is the final salicylic acid concentration?
7. A 0.653 g of a monoprotic solid acid (mw= 157 g/mol) is dissolved in water to produce a 50.0 mL solution. The pH of this solution is measure to be pH = 2.13. Determine the ionization constant (Ka) of the acid. 8. A buffer is 0.50 M CH3COOH(aq) and 0.50 M Na(C6H-C00) (aq). For CH2COOH pKa = 4.20 a) Calculate the pH of the buffer solution. b) Calculate the pH after the addition of 40 mL of a 0.150...
1. A l64-g sample of HF is dissolved in water to give 2.0 x 10' ml of solution. The concentration of solution is: A) 0.82 M B) 0.16 M C) 0.08 M D) 4.1 M E) 8.2 M 2. You have 75.0 mL of a 2.50 M solution of Na,CrO(ag). You also have 125 mL of a 2.01 M solution of AgNOs(ag), Calculate the concentration of Cro. after the two solutions are mixed together. A) 0.00 M B) 0.309 M...
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