In a coulometric Karl Fischer water analysis, 50.00 mL of methanol (no residual water) that contained...
In a coulometric Karl Fischer water analysis, 50.00 mL of
methanol (no residual water) that contained 2.930 g of a water-containing sample required 5398 C to generate enough iodine to react with all of the water in the sample. Find the percent by mass of water in the sample.
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In a coulometric Karl Fischer water analysis, 50.00 mL of
methanol (no
residual water) that contained...
QUESTION 12 Using the Volumetric Karl Fischer Titration technique, 5.0 mL of 0.1 M 12 solution...
QUESTION 12 Using the Volumetric Karl Fischer Titration technique, 5.0 mL of 0.1 M 12 solution was necessary to react with 15 ml of a solution sample. What is the concentration of water in the solution sample, in mg/ml? a. 0.6 mg/ml O b.6.0 mg/ml O c. 0.033 mg/ml O d. 0.33 mg/ml
A solution is prepared by dissolving 20.2 mL of methanol (CH3OH) in 100.0 mL of water...
A solution is prepared by dissolving 20.2 mL of methanol (CH3OH) in 100.0 mL of water at 25 ∘C. The final volume of the solution is 118 mL. The densities of methanol and water at this temperature are 0.782 g/mL and 1.00 g/mL, respectively. For this solution, calculate mole percent M=4.18 m=4.93 percent by mass= 13.6% mole fraction= 8.15*10^-2
The Fe2+ (55.845 g/mol) content of a 2.264 g steel sample dissolved in 50.00 mL of...
The Fe2+ (55.845 g/mol) content of a 2.264 g steel sample dissolved in 50.00 mL of an acidic solution was determined by tiration with a standardized 0.120 M potassium permanganate (KMnO4, 158.034 g/mol) solution. The titration required 44.82 mL to reach the end point. What is the concentration of iron in the steel sample? Express your answer as grams of Fe per gram of steel Mn2+5 Fe34 H20 + 5 Fe2+ MnO8 H concentration g Fe/g steel A 1.969 g...
4. A 0.5255 g sample containing an unknown mass of SnCl2 is dissolved in 50.00 mL...
4. A 0.5255 g sample containing an unknown mass of SnCl2 is dissolved in 50.00 mL of water and titrated with 0.02050 M KMnO4 under mildly acidic conditions. The unbalanced titration reaction is shown below. MnO4 (aq) + Sn²(aq) MnO2(8) + Sn** (aq) a. Use the half-reaction method to balance the titration reaction. (5 pts) b. Given that 32.25 mL of KMnO, was required to reach the endpoint, calculate the percent SnCl2 in the sample. (5 pts)
A solution prepared with 0.481 g of solid in 50.00 mL of deionized water was found...
A solution prepared with 0.481 g of solid in 50.00 mL of deionized water was found to have a concentration of 0.0908 mol solid/L Use dimensional analysis (unit analysis) to determine the molecular mass of the solid. a. Use correct Sig Figs and Units. Look at Part C #3 on page 12.8 to determine which solid this is. b.
16 7-2 Titration Calculations Ascorbic acid (vitamin C) reacts with according to the equation Starch is used as an i...
16 7-2 Titration Calculations Ascorbic acid (vitamin C) reacts with according to the equation Starch is used as an indicator in the reaction. The end point is marked by the appearance of a deep blue starch-iodine complex when the first fraction of a drop of unreacted remains in the solution. TI (a) Stundurdization: If 29.41 mL of iodine solution is required to react with 0.197 0 g of pure ascorbic acid, what is the molarity of the iodine solution?! (b)...
6. Calcium oxide reacts with nitric acid to produce calcium nitrate and water. How many grams...
6. Calcium oxide reacts with nitric acid to produce calcium nitrate and water. How many grams of calcium oxide are required for complete reaction with 30.0 mL of 0.587 M nitric acid? The molar mass of calcium oxide is 56.077 g/mol. (Hint: start by writing the balanced equation for the reaction.) 7. A sample contains an unknown amount of succinic acid, H2CHO. If 0.3540 g of the sample requires 42.70 mL of 0.1000 M NaOH to neutralize the H2C,H404 completely,...
the determination of the percent water in a compound DATA TABLE Compound selected for analysis hydrole...
the
determination of the percent water in a compound
DATA TABLE Compound selected for analysis hydrole of Cusoa Mass of crucible and cover (9) 38,75 Mass of crucible, cover, and hydrated sample (g) 39.95 Mass of hydrated sample (g) Mass of crucible, cover, and dehydrated sample-1" weighing (9) 39,48 Mass of crucible, cover, and dehydrated sample - 2nd weighing (g) 39,44 Mass of crucible, cover, and dehydrated sample - 3rd weighing (9) Mass of crucible, cover, and dehydrated sample -...
If the solubility of sodium chloride (NaCl) is 30.6 g/100 mL of H2O at a given...
If the solubility of sodium chloride (NaCl) is 30.6 g/100 mL of H2O at a given temperature, how many grams of NaCl can be dissolved in 250.0 mL of H2O? If the solubility of glucose (C6H12O6) is 120.3 g/100 mL of H2O at a given temperature, how many grams of C6H12O6 can be dissolved in 75.0 mL of H2O? Only 0.203 mL of C6H6 will dissolve in 100.000 mL of H2O. Assuming that the volumes are additive, find the volume/volume...
Vitamin C (ascorbic acid) from foods can be measured by titration with I3-If 29.41 mL of...
Vitamin C (ascorbic acid) from foods can be measured by titration with I3-If 29.41 mL of I3- solution are required to react with 0.1970 g of pure ascorbic acid, what is the molarity of the I3- solution? A vitamin C tablet containing ascorbic acid plus inert binder was ground to a powder, and 0.4242 g was titrated by 31.63 mL of I3-. How many moles of ascorbic acid are present in the 0.4242 g sample? Find the weight percent of...
QUESTION 12 Using the Volumetric Karl Fischer Titration technique, 5.0 mL of 0.1 M 12 solution was necessary to react with 15 ml of a solution sample. What is the concentration of water in the solution sample, in mg/ml? a. 0.6 mg/ml O b.6.0 mg/ml O c. 0.033 mg/ml O d. 0.33 mg/ml
The Fe2+ (55.845 g/mol) content of a 2.264 g steel sample dissolved in 50.00 mL of an acidic solution was determined by tiration with a standardized 0.120 M potassium permanganate (KMnO4, 158.034 g/mol) solution. The titration required 44.82 mL to reach the end point. What is the concentration of iron in the steel sample? Express your answer as grams of Fe per gram of steel Mn2+5 Fe34 H20 + 5 Fe2+ MnO8 H concentration g Fe/g steel A 1.969 g...
4. A 0.5255 g sample containing an unknown mass of SnCl2 is dissolved in 50.00 mL of water and titrated with 0.02050 M KMnO4 under mildly acidic conditions. The unbalanced titration reaction is shown below. MnO4 (aq) + Sn²(aq) MnO2(8) + Sn** (aq) a. Use the half-reaction method to balance the titration reaction. (5 pts) b. Given that 32.25 mL of KMnO, was required to reach the endpoint, calculate the percent SnCl2 in the sample. (5 pts)
A solution prepared with 0.481 g of solid in 50.00 mL of deionized water was found to have a concentration of 0.0908 mol solid/L Use dimensional analysis (unit analysis) to determine the molecular mass of the solid. a. Use correct Sig Figs and Units. Look at Part C #3 on page 12.8 to determine which solid this is. b.
16 7-2 Titration Calculations Ascorbic acid (vitamin C) reacts with according to the equation Starch is used as an indicator in the reaction. The end point is marked by the appearance of a deep blue starch-iodine complex when the first fraction of a drop of unreacted remains in the solution. TI (a) Stundurdization: If 29.41 mL of iodine solution is required to react with 0.197 0 g of pure ascorbic acid, what is the molarity of the iodine solution?! (b)...
6. Calcium oxide reacts with nitric acid to produce calcium nitrate and water. How many grams of calcium oxide are required for complete reaction with 30.0 mL of 0.587 M nitric acid? The molar mass of calcium oxide is 56.077 g/mol. (Hint: start by writing the balanced equation for the reaction.) 7. A sample contains an unknown amount of succinic acid, H2CHO. If 0.3540 g of the sample requires 42.70 mL of 0.1000 M NaOH to neutralize the H2C,H404 completely,...
the
determination of the percent water in a compound
DATA TABLE Compound selected for analysis hydrole of Cusoa Mass of crucible and cover (9) 38,75 Mass of crucible, cover, and hydrated sample (g) 39.95 Mass of hydrated sample (g) Mass of crucible, cover, and dehydrated sample-1" weighing (9) 39,48 Mass of crucible, cover, and dehydrated sample - 2nd weighing (g) 39,44 Mass of crucible, cover, and dehydrated sample - 3rd weighing (9) Mass of crucible, cover, and dehydrated sample -...
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