1. Why did you dissolve Oxalate (sodium oxalate or your sample) in sulfuric acid rather than...
1. Why did you dissolve Oxalate (sodium oxalate or your sample) in sulfuric acid rather than in water?
2. Why did you heat solution (oxalate and sulfuric acid mixture) before titration with KMnO4?
Homework Answers
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1. Why did you dissolve Oxalate (sodium oxalate or your sample)
in sulfuric acid rather than...
Why does 0.01M KMnO4 not change color at first when it is added to 0.025M of Na2C2O4 (sodium oxalate)? I did a titration...
Why does 0.01M KMnO4 not change color at first when it is added to 0.025M of Na2C2O4 (sodium oxalate)? I did a titration of KMnO4 and Na2C2O4 a week ago and initially when I added the KMnO4, it turned the sodium oxalate a deep purple. It later turned colorless after about 15 seconds. Why is that? Is there a reasonable explanation?
The water solubilities of oxalic acid and sodium oxalate at room temperature are 10g/100ml and 3.7...
The water solubilities of oxalic acid and sodium oxalate at room temperature are 10g/100ml and 3.7 g/100ml, respectively. Could you prepare oxalic acid by adding HCl to a solution of sodium oxalate, cooling it to room temperature and then filtering the resulting mixture? Explain why or why not.
The water solubilities of oxalic acid and sodium oxalate at room temp are 10g/100ml and 3.7g/100ml...
The water solubilities of oxalic acid and sodium oxalate at room temp are 10g/100ml and 3.7g/100ml respectively. Could you prepare oxalic acid by adding HCl to a solution of sodium oxalate, cooling it to room temp, and filtering the resulting mixture? Explain why or why not.
Of Oxalate Before beginning this experiment in the laboratory, you should be able to answer the f...
of Oxalate Before beginning this experiment in the laboratory, you should be able to answer the following questions 1. If0.4586 g of sodium oxalate, Na C204, requires 33.67 mL of a KMno4 solution to reach the end point, what is the molarity of the KMnO4 solution? Titration of an oxalate sample gave the following percentages: 15.53%, 15.55%, and 15.56%. Calculate the average and the standard deviation. 2. 3. Why does the solution decolorize upon standing after the equivalence point has...
5. Will the calculated molarity of NaOH be lower or higher if you use tap water...
5. Will the calculated molarity of NaOH be lower or higher if you use tap water rather than deionized water to dissolve the KHP crystals or to rinse down the walls of the flask during the titration? Tap water contains some calcium bicarbonate. The calculated molti O NAOH will be lower lose top water rother thon deionited water to dissolve the crystals 6. Write and balance the equation for a neutralization of a sulfuric acid solution of unknown concentration by...
An unknown sample of sulfuric acid was determined by the method used in this experiment. The...
An unknown sample of sulfuric acid was determined by the method used in this experiment. The sodium hydroxide was standardized by titration of 0.0855g of oxalic acid dihydrate with 25.28mL of sodium hydroxide. 10.00ml of the unknown sulfuric acid was then titrated to endpoint with 32.34mL of the same sodium hydroxide solution. What was the concentration of the sulfuric acid? (Show your work!!)
sulfuric acid + sodium hydroxide yields sodium sulfate AFroH Cag) t0 cag) Net Ionic: 5. Sulfuric...
sulfuric acid + sodium hydroxide yields sodium sulfate
AFroH Cag) t0 cag) Net Ionic: 5. Sulfuric acid+sodium hydroxide (aq) yields sodium sulfate (aq) water (aq) Balanced: Complete Ionic: Net Ionic: Question: In Part D, #4 and # 5 start with equal amounts of 0.1 M acids. Loc chemical reactions for these parts, why did the sulfuric acid need more so the phenolphthalein pink than the nitric acid?
Why did you wash the ether solution with sodium bicarbonate? Write chemical equations for the rea...
Why did you wash the ether solution with sodium bicarbonate? Write chemical equations for the reactions that took place. b. At which purification steps was the unreacted methanol removed in the reaction? Some of it may have been removed in more than one place. c. Three-Step Synthesis of Methyl Anisate (Step 3) 0 CHOH. Н.so, cat.) Wear gloves. Methanol is poisonous. Ether is an anesthetic, so don't breathe it. Sulfuric acid is a strong corrosive acid. Wash any you spill...
Why does the pinacol rearrangement often use sulfuric acid, H2SO4, as the acid catalyst rather than...
Why does the pinacol rearrangement often use sulfuric acid, H2SO4, as the acid catalyst rather than hydrochloric acid, HCl? A. Only acids with more than one proton can catalyze the pinacol rearrangement. B. hydrochloric acid is too small to effectively react with the diol in the reaction C. Hydrochloric acid cannot create a water leaving group in the first step D. the presence of the chloride ion could result in a competing substitution reaction
1. The reaction mixture contains isopentyl acetate, isopentyl alcohol, water, acetic acid and sulfuric acid. a)...
1. The reaction mixture contains isopentyl acetate, isopentyl alcohol, water, acetic acid and sulfuric acid. a) Why is the reaction mixture extracted with sodium bicarbonate? In other words, what two substances does sodium bicarbonate react with in the reaction mixture and why are these reactions useful? (4 pts) b) Write a balanced chemical equation for each reaction involving sodium bicarbonate. c) When the reaction mixture is extracted with sodium bicarbonate solution, what substances will be in the aqueous layer? What...
of Oxalate Before beginning this experiment in the laboratory, you should be able to answer the following questions 1. If0.4586 g of sodium oxalate, Na C204, requires 33.67 mL of a KMno4 solution to reach the end point, what is the molarity of the KMnO4 solution? Titration of an oxalate sample gave the following percentages: 15.53%, 15.55%, and 15.56%. Calculate the average and the standard deviation. 2. 3. Why does the solution decolorize upon standing after the equivalence point has...
5. Will the calculated molarity of NaOH be lower or higher if you use tap water rather than deionized water to dissolve the KHP crystals or to rinse down the walls of the flask during the titration? Tap water contains some calcium bicarbonate. The calculated molti O NAOH will be lower lose top water rother thon deionited water to dissolve the crystals 6. Write and balance the equation for a neutralization of a sulfuric acid solution of unknown concentration by...
An unknown sample of sulfuric acid was determined by the method used in this experiment. The sodium hydroxide was standardized by titration of 0.0855g of oxalic acid dihydrate with 25.28mL of sodium hydroxide. 10.00ml of the unknown sulfuric acid was then titrated to endpoint with 32.34mL of the same sodium hydroxide solution. What was the concentration of the sulfuric acid? (Show your work!!)
sulfuric acid + sodium hydroxide yields sodium sulfate
AFroH Cag) t0 cag) Net Ionic: 5. Sulfuric acid+sodium hydroxide (aq) yields sodium sulfate (aq) water (aq) Balanced: Complete Ionic: Net Ionic: Question: In Part D, #4 and # 5 start with equal amounts of 0.1 M acids. Loc chemical reactions for these parts, why did the sulfuric acid need more so the phenolphthalein pink than the nitric acid?
Why did you wash the ether solution with sodium bicarbonate? Write chemical equations for the reactions that took place. b. At which purification steps was the unreacted methanol removed in the reaction? Some of it may have been removed in more than one place. c. Three-Step Synthesis of Methyl Anisate (Step 3) 0 CHOH. Н.so, cat.) Wear gloves. Methanol is poisonous. Ether is an anesthetic, so don't breathe it. Sulfuric acid is a strong corrosive acid. Wash any you spill...
1. The reaction mixture contains isopentyl acetate, isopentyl alcohol, water, acetic acid and sulfuric acid. a) Why is the reaction mixture extracted with sodium bicarbonate? In other words, what two substances does sodium bicarbonate react with in the reaction mixture and why are these reactions useful? (4 pts) b) Write a balanced chemical equation for each reaction involving sodium bicarbonate. c) When the reaction mixture is extracted with sodium bicarbonate solution, what substances will be in the aqueous layer? What...
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