A sample of battery acid is to be analyzed for its sulfuric acid content. A 1.00-mL...
A sample of battery acid is to be analyzed for its sulfuric acid content. A 1.00-mL sample weighs 1.250 g . This 1.00-mL sample is diluted to 250.0mL, and 10.00mL of this diluted acid requires 33.46 mL of 4.820×10−3 M Ba(OH)2 for its titration.
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A sample of battery acid is to be analyzed for its sulfuric acid
content. A 1.00-mL...
15. A 66 mL sample of a solution of sulfuric acid, H,SO, is neutralized by 34...
15. A 66 mL sample of a solution of sulfuric acid, H,SO, is neutralized by 34 mL of a 0.13 M sodium hydroxide solution. Calculate the molarity of the sulfuric acid solution 16. If 300 mL of 3.9 M HCl is added to 400 mL of 2.9 M NaOH, what is the pH? 17. If 287 mL of 4.7 M HCl solution is added to 284 mL of 3.2 M Ba(OH), solution, what will the pH be? 18. What is...
I circled the right answer 19) Water from University Lake was analyzed for its Fe content....
I circled the right answer
19) Water from University Lake was analyzed for its Fe content. A 25.0-mL sample of lake water was acidified with nitric acid and treated with excess KSCN to form a red complex. (KSCN itself is colorless.) The solution was then diluted to 100.0 mL and put in a 1.00 cm pathlength cell, where it yielded an absorbance of 0.545. For comparison, a 10.0-mL reference sample of 6.80 x 10 M Fe was treated with HNO3...
A mineral sample is analyzed for its cobalt and calcium content. A sample is dissolved, and...
A mineral sample is analyzed for its cobalt and calcium content. A sample is dissolved, and then the cobalt and calcium are precipitated as Co(OH),(s) and Ca(OH),(s). At what pH can Co(OH),(s) be separated from Ca(OH),(s) at 25 °C? Assume that an effective separation requires a maximum concentration of the less soluble hydroxide of Ksp (CO(OH)2) = 5.9 x 10-15 M Ksp (Ca(OH)) = 5.0 x 10-6 M pH= pH = What is the concentration of the more soluble hydroxide...
A 21.524 g paint sample was analyzed for barium (Ba2+, MW = 137.327 g/mole) by an...
A 21.524 g paint sample was analyzed for barium (Ba2+, MW = 137.327 g/mole) by an EDTA back titration: Ba2+(aq) + Y4–(aq) à BaY2–(aq). The sample was dissolved in acid and sufficient water was added to produce a volume of 100 mL. 10.00 mL of this concentrated solution was diluted to a volume of 50.00 mL. 25.00 mL of the diluted solution was treated with 33.95 mL of excess 0.09456 M EDTA. The excess EDTA was titrated to the endpoint...
Question 10 (2 points) A 13.9800-g sample of a salt was analyzed for its iron content...
Question 10 (2 points) A 13.9800-g sample of a salt was analyzed for its iron content as follows: the entire sample was dissolved and diluted to 400.0 mL in a volumetric flask. A 80.00-ml aliquot of the solution required 25.38-mL of a 0.04119 M potassium permanganate solution to reach equivalence. A blank correction of 0.50 mL was required. Calculate the %(w/w) Fe in the sample. The net-ionic equation for the reaction is MnO4 (aq) + 8H+ (aq) + 5Fe2+(aq) -...
A 15.00 mL sample of nitric acid, HNO3, requires 0.655 g of barium hydroxide, Ba(OH)2 for...
A 15.00 mL sample of nitric acid, HNO3, requires 0.655 g of barium hydroxide, Ba(OH)2 for titration to the equivalence point. What is the concentration of the nitric acid? 2 HNO3(aq) + Ba(OH)2(aq) → Ba(NO3)2(aq) + 2 H2O(l)
To determine the concentration of a solution of sulfuric acid, a 125.0-mL sample is placed in...
To determine the concentration of a solution of sulfuric acid, a 125.0-mL sample is placed in a flask and titrated with a 0.1433 M solution of cesium hydroxide. A volume of 20.29 mL is required to reach the phenolphthalein endpoint. Calculate the concentration of sulfuric acid in the original sample. A student has 530.0 mL of a 0.1474 M aqueous solution of MnSO4 to use in an experiment. He accidentally leaves the container uncovered and comes back the next week...
25 mL of a serum sample is to be analyzed by atomic emission spectroscopy for silver (Ag) metal. ...
Clearly, the answer is 220ppm. However, I need the steps leading
to it.
25 mL of a serum sample is to be analyzed by atomic emission spectroscopy for silver (Ag) metal. After thorough mixing, a student transferred 2.5 mL of this serum sample to a 100 mL volumetric flask followed by the addition of 10 mL 0.5 M sulfuric acid to the sample. He then diluted it to volume in the volumetric flask with deionized water. After setting up his...
A 2.50 g sample of bronze was dissolved in sulfuric acid. The copper in the alloy...
A 2.50 g sample of bronze was dissolved in sulfuric acid. The copper in the alloy reacted with sulfuric acid as follows: Cu(s) + 2H2SO4 (aq) → CuSO4 (aq) + SO2(g) + 2 H20 (1) The CuSO4 formed in the reaction was mixed with Kl to form Cul (copper iodide). 2 CuSO4 (aq) + 51 → 2 Cul (s) + 1; (aq) + 2 So(aq) The formed in that reaction was then titrated with (aq) + 2 5,03 – 31...
During a titration experiment, a 24.8 ml sample of arsenic acid (It, AsO) of unknown concentrations...
During a titration experiment, a 24.8 ml sample of arsenic acid (It, AsO) of unknown concentrations analyzed. A total of 33.33 ml of 0.2500 M Ca(OH)is required to reach the endpoint. What is the concentration of the arsenic acid sample? 2 WAso,(aq) + 3 Ca(OH)2(aq) - Caz(Aso.)2(s) + 6H20 (1)
15. A 66 mL sample of a solution of sulfuric acid, H,SO, is neutralized by 34 mL of a 0.13 M sodium hydroxide solution. Calculate the molarity of the sulfuric acid solution 16. If 300 mL of 3.9 M HCl is added to 400 mL of 2.9 M NaOH, what is the pH? 17. If 287 mL of 4.7 M HCl solution is added to 284 mL of 3.2 M Ba(OH), solution, what will the pH be? 18. What is...
I circled the right answer
19) Water from University Lake was analyzed for its Fe content. A 25.0-mL sample of lake water was acidified with nitric acid and treated with excess KSCN to form a red complex. (KSCN itself is colorless.) The solution was then diluted to 100.0 mL and put in a 1.00 cm pathlength cell, where it yielded an absorbance of 0.545. For comparison, a 10.0-mL reference sample of 6.80 x 10 M Fe was treated with HNO3...
A mineral sample is analyzed for its cobalt and calcium content. A sample is dissolved, and then the cobalt and calcium are precipitated as Co(OH),(s) and Ca(OH),(s). At what pH can Co(OH),(s) be separated from Ca(OH),(s) at 25 °C? Assume that an effective separation requires a maximum concentration of the less soluble hydroxide of Ksp (CO(OH)2) = 5.9 x 10-15 M Ksp (Ca(OH)) = 5.0 x 10-6 M pH= pH = What is the concentration of the more soluble hydroxide...
Question 10 (2 points) A 13.9800-g sample of a salt was analyzed for its iron content as follows: the entire sample was dissolved and diluted to 400.0 mL in a volumetric flask. A 80.00-ml aliquot of the solution required 25.38-mL of a 0.04119 M potassium permanganate solution to reach equivalence. A blank correction of 0.50 mL was required. Calculate the %(w/w) Fe in the sample. The net-ionic equation for the reaction is MnO4 (aq) + 8H+ (aq) + 5Fe2+(aq) -...
Clearly, the answer is 220ppm. However, I need the steps leading
to it.
25 mL of a serum sample is to be analyzed by atomic emission spectroscopy for silver (Ag) metal. After thorough mixing, a student transferred 2.5 mL of this serum sample to a 100 mL volumetric flask followed by the addition of 10 mL 0.5 M sulfuric acid to the sample. He then diluted it to volume in the volumetric flask with deionized water. After setting up his...
A 2.50 g sample of bronze was dissolved in sulfuric acid. The copper in the alloy reacted with sulfuric acid as follows: Cu(s) + 2H2SO4 (aq) → CuSO4 (aq) + SO2(g) + 2 H20 (1) The CuSO4 formed in the reaction was mixed with Kl to form Cul (copper iodide). 2 CuSO4 (aq) + 51 → 2 Cul (s) + 1; (aq) + 2 So(aq) The formed in that reaction was then titrated with (aq) + 2 5,03 – 31...
During a titration experiment, a 24.8 ml sample of arsenic acid (It, AsO) of unknown concentrations analyzed. A total of 33.33 ml of 0.2500 M Ca(OH)is required to reach the endpoint. What is the concentration of the arsenic acid sample? 2 WAso,(aq) + 3 Ca(OH)2(aq) - Caz(Aso.)2(s) + 6H20 (1)
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