A 20.00-mL sample of aqueous oxalic acid, H2C2O4, was titrated with a 0.09113-M solution of potassium permanganate, KMNO4. 2MNO4 (aq) + 5H2C2O4(aq) + 6H*(aq) 10CO2 (g) + 2MN²+(aq) + 8H2O (1) A volume of 23.24 mL was required to reach the end point. What is the oxalic acid molarity?
Q: An analytical chemist weighs out 0.344 g of an unknown diprotic acid into a 250 mL volumetric flask…
A: Given: Mass of acid = 0.344 g Molarity of NaOH = 0.0700 M Volume of NaOH = 65.5 mL = 0.0655 L
Q: In one trial of the standardization of a Na2S2O3 solution, a 10.00 mL volume of 5.00×10-3 M KIO3 is…
A: Given data is as follows: The volume of KIO3 = 10.00 mL The concentration of KIO3 = 5.00×10-3 M The…
Q: You have been provided with a 35.7 mL sample of lithium hydroxide (LiOH) of unknown concentration.…
A:
Q: A suitable method for the determination of vitamin C (ascorbic acid, C6H3O6) is a titration with…
A: Ascorbic acid (vitamin C) is mainly found in fresh fruits such as lemon, orange, lime, peach,…
Q: An unknown solid acid is either citric acid or tartaric acid. To determine which acid you have, you…
A: Answer:- This question is answered by using the simple concept of determination unknown acid using…
Q: A quantitative analysis for ethanol, C2H60, is accomplished by a redox back titration. Ethanol is…
A:
Q: In one trial of the standardization of a Na2S2O3 solution, a 10.00 mL volume of 5.00×10-3 M KIO3 is…
A: Solution is given below in next step
Q: By pipet, 19.00 mL of a 0.823 M stock solution of potassium permanganate (KMnO4) was transferred to…
A: Solutions comprising a definite solute always follows a generalized expression known as "molarity…
Q: A student is asked to perform a neutralization reaction between hydrochloric acid, HCl and sodium…
A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…
Q: A student is asked to perform a neutralization reaction between hydrochloric acid, HCl and sodium…
A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…
Q: Exactly 410.4 mg of primary standard potassium acid phthalate (KHP), formula weight 204.2, is…
A:
Q: Aqueous sodium hypochlorite (NaOCl, household bleach) is a strong oxidizing agent that reacts with…
A:
Q: KHP (aq)+NaOH (aq)-->NaKHP (aq)+H2O(l) Trial Vi (mL) Vf (mL) 1 36.19 48.56 2 3 A…
A: According to the chemical equation, the number of moles of KHP react with NaOH are equal.
Q: By pipet, 10.00 mL of a 0.823 M stock solution of potassium permanganate (KMnO4) was transferred to…
A:
Q: A student prepares a dilute solution of sodium hydroxide, NaOH(aq), starting with 6 M so- dium…
A: The question is based on the concept of titration. we are titrating a strong base with a weak acid.…
Q: 2.) Five standardized dilutions of aqueous lead(11) chromate solution were prepared by adding a…
A:
Q: The analyst wanted to measure the zinc oxide content of a 1.25-g sample. The sample was treated…
A: As per rules, only three questions can be answered: Titrimetric analysis method: Back titration…
Q: Maganite is the leading brand for antacid to alleviate heartburn. Its active ingredient is a…
A: A 50.0 mL saturated solution was prepared. After filtering each solution, a 5.0 mL aliquot was…
Q: 4.Suppose you run a titration of an acid yourself. You do it three times be- tween an acid and…
A: Given information is as follows; Average mass of acid = 9.555 g Volume of sodium hydroxide = 9.10 mL…
Q: We want to determine the purity of alum sample bought in a local pharmacy in Miagao. A Chem 28…
A: Mass of sample = 1.5879 gm Mass of Al2O3 = 0.1572 gm Molar mass of potash alum = 474.4 gm/mole…
Q: Tartaric acid, H2C4H4O6, is a diprotic acid that naturally occurs in the production of wine. Jose…
A: Given, mass of KHP=3.001 g Volume of NaOH=35.21 mL
Q: (ii) A student was given 400 cm of aqueous ammonia solution, NH, (aq). The student was asked to…
A: The balanced reaction given is: 2NH3(aq)+H2SO4(aq)→(NH4)2SO4 Conversion unit: 1 L=1 dm31 L=1000 cm3…
Q: A titration of a 0.7879g sample potassium hydrogen phthalate, KHP (GFW= 204.23g/mole), required…
A:
Q: A 36.0 mL sample of aqueous sulfuric acid was titrated with O.250 M KOH(aq) until the acid-base…
A: The volume of sulfuric acid = 36.0 mL The molarity of KOH = 0.250 M The mass of residue formed after…
Q: A student added 1.28 g of sodium carbonate monohydrate and 1.28 g of calcium chloride separately…
A: Chemical equation of the given reaction is: Na2CO3(aq) +…
Q: A student mixed 100.00 mL of Ba(OH)2(aq) (unknown molarity) with 500.00 mL of 0.0200 M NAOH(aq) in a…
A: Solution -
Q: A permanganate solution is prepared by dissolving 20.0123 g KMNO4 in 500 mL of distilled water and…
A:
Q: ?…
A: Malic acid is an organic compound with the molecular formula C4H6O5. It is a dicarboxylic acid that…
Q: In one trial of the standardization of a Na2S2O3 solution, a 10.00 mL volume of 5.00×10-3 M KIO3 is…
A:
Q: Solution A was prepared by weighing 6.08 grams of K3Fe(CN)6 (MW 329.2 g/mol) and dissolving the…
A: Given the mass of K3Fe(CN)6 taken to prepare the solution-A = 6.08 g Molar mass of K3Fe(CN)6 =…
Q: QUES A certain compound was known to contain calcium and chlorine. A sample that weighed 2.78g was…
A: Mass of sample taken = 2.78 g Mass of CaO formed by decomposition of calcium oxalate = 1.40 g
Q: The concentration of arsenic in an insecticide can be determined gravimetrically through its…
A: Mass% of As2O3 in the insecticide is to be calculated. Molar mass of Mg2As2O7 and As2O3 is given.…
Q: A student is diluting an aqueous NH4SCN solution for an experiment. The student starts with a O.100…
A: Dear student, in the given question, the NH4SCN solution is being diluted. Dilution is done by…
Q: The balanced equation for the neutralization reaction of aqueous H2SO4 with aqueous KOH is shown.…
A:
Q: A student prepares a dilute solution of sodium hydroxide, NaOH(aq), starting with 6 M so- dium…
A: We have to calculate molar concentration of the sodium hydroxide solution i.e NaOH. Given :…
Q: Write a balanced chemical equation describing the mixing of the following 2 reagents in aqueous…
A: 3 (NH4)2S (aq) + 2 V(NO3)3 (aq) → 6 NH4NO3 (aq) + V2S3 (aq) The kind of reaction taking place…
Q: A quantitative analysis for ethanol, C2H6O, can be accomplished by a redox back titration. Ethanol…
A: When it comes to back titration, the stoichiometry between Cr2O72- and the analyte C2H6O and between…
Q: The grams and %w/w of Malic acid present in the 200.0 mL wine sample
A:
Q: A solution is prepared by pipetting 25.0 mL of 0.350 M CuCl2 into a 100.0 mL volumetric flask,…
A: Concentration in terms of molarity is defined as the moles of solute present per litre of the…
Q: A 0.879 g sample of a CaCl2·2H2O/K2C2O4·H2O solid salt mixture is dissolved in ~100mL of deionized…
A: Given:Mass of CaCl2.2H2O +mass of K2C2O4·H2O = 0.879 g.Mass of CaC2O4 = 0.284 g.Volume of water =…
Q: Acetic Acid reacts with sodium hydroxide in the following fashion: CH_3COOH(aq)+NaOH(aq) >…
A:
Q: Write the balanced equation for the reaction of aqueous Pb(ClO3)2Pb(ClO3)2 with aqueous NaI.NaI.…
A: Given information: Volume of Pb(ClO3)2 = 1.50 L Concentration of NaI = 0.250 M Volume of NaI = 0.100…
Q: Sodium carbonate is a reagent that may be used to standardize acids in the same way that you have…
A: Ratio of number of moles present in the solution to the volume of solution in liter is defined as…
Q: Lead ions can be precipitated from solution with KCI according to the following reaction: Pb (ag) +…
A: Given data mass of KCl = 28.7 g mass of Pb2+ = 25.8 g Reaction : Pb2+ + 2 KCl → PbCl2 + 2 K+…
Q: Potassium hydrogen phthalate is used as a primary standard in finding the concentration of a…
A: Potassium hydrogen phthalate is used as a primary standard in finding the concentration of a…
Q: A permanganate solution is prepared by dissolving 20.0123 g KMNO4 in 500 mL of distilled water and…
A: Given: The reaction is as follows, 5H2C2O4+2MnO4-+6H+⇌10CO2+2Mn2++8H2O Molarity of oxalic acid =…
Q: Maganite is the leading brand for antacid to alleviate heartburn. Its active ingredient is a…
A: The amount of a substance that resides in a solution determines the concentration of the solution.…
Q: Molarity of KMNO4 solution (M) from bottle Final reading of buret (KMNO4) (mL) Initial reading of…
A: We have to find the moles of KMnO4
Q: The conversion of nitrogen to ammonia, an essential process in the nitrogen cycle, occurs only in…
A: Given, the reaction involved in the titration: The volume of the Mo3+ sample = 30 mL The volume of…
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
- You are given a solid mixture of NaNO2 and NaCl and are asked to analyze it for the amount of NaNO2 present. To do so, you allow the mixture to react with sulfamic acid, HSO3NH2, in water according to the equation NaNO2(aq) + HSO3NH2(aq) NaHSO4(aq) + H2O() + N2(g) What is the weight percentage of NaNO2 in 1.232 g of the solid mixture if reaction with sulfa-mic acid produces 295 mL of dry N2 gas with a pressure of 713 mm Hg at 21.0 C?On Easter Sunday, April 3, 1983, nitric acid spilled from a tank car near downtown Denver, Colorado. The spill was neutralized with sodium carbonate: 2HNO3(aq)+Na2CO3(aq)2NaNO3(aq)+H2O(l)+CO2(g) a. Calculate H for this reaction. Approximately 2.0 104 gal nitric acid was spilled. Assume that the acid was an aqueous solution containing 70.0% HNO3 by mass with a density of 1.42 glcm3. What mass of sodium carbonate was required for complete neutralization of the spill, and what quantity of heat was evolved? (Hf for NaNO3(aq) = 467 kJ/mol) b. According to The Denver Post for April 4, 1983, authorities feared that dangerous air pollution might occur during the neutralization. Considering the magnitude of H, what was their major concern?The carbon dioxide exhaled in the breath of astronauts is often removed from the spacecraft by reaction with lithium hydroxide 2LiOH(s)+CO2(g)Li2CO3(s)+H2O(l) Estimate the grams of lithium hydroxide required per astronaut per day. Assume that each astronaut requires 2.50 103 kcal of energy per day. Further assume that this energy can be equated to the heat of combustion of a quantity of glucose, C6H12O6, to CO2(g) and H2O(l). From the amount of glucose required to give 2.50 103 kcal of heat, calculate the amount of CO2 produced and hence the amount of LiOH required. The H for glucose(s) is 1273 kJ/mol.
- Tartaric acid, H2C4H4O6, is a diprotic acid that naturally occurs in the production of wine. Jose was tasked to find out the acid content in a 100.0 mL wine sample by titrating it with a standardized solution of NaOH. He was able to establish the working concentration of the NaOH solution by using 35.21 mL of it to titrate a primary standard of KHP that weighed 3.001 g. The grams and %w/w of Tartaric acid present in the 100.0 mL wine sample were then determined by titrating a 25.00 mL aliquot using 43.56 mL of the standardized NaOH solution. H2C4H4O6 (aq) + 2NaOH (aq) ↔ Na2C4H4O6 (aq) + 2H2O (l) Assume that the density of the wine sample is 1.000 g/mL MM of KHP = 204.22 g/mol MM of H2C4H4O6 = 150.087 g/mol What is the molar concentration of the prepared NaOH solution?…A student prepares a dilute solution of sodium hydroxide, NaOH (aq), starting with 6 M sodium hydroxide. She then titrates a 1.372 g sample of KHP with the dilute sodium hydroxide solution, NaOH (aq), to a phenolphthalein end point. a) If the titration required 21.84 mL of sodium hydroxide, NaOH (aq), calculate the molar concentration of the sodium hydroxide solution, NaOH (aq). (Remember that KHP is potassium hydrogen phthalate, KHC8H4O4, NOT potassium hydrogen phosphorus!) b) The student uses the same sodium hydroxide to titrate 10.00 mL of vinegar to a phenolphthalein end point. If the titration required 27.48 mL of sodium hydroxide, NaOH (aq), calculate the molar concentration of acetic acid, HC2H3O2 (aq), in the vinegar. c) Calculate the mass percent of acetic acid, HC2H3O2(aq), in the vinegar using the molar concentration for acetic acid, HC2H3O2 (aq), determined in part b and assuming the density of the solution is 1.01 g/mL.A student prepares a dilute solution of sodium hydroxide, NaOH (aq), starting with 6 M sodium hydroxide. She then titrates a 1.372 g sample of KHP with the dilute sodium hydroxide solution, NaOH (aq), to a phenolphthalein end point. A.) If the titration required 21.84 mL of sodium hydroxide, NaOH (aq), calculate the molar concentration of the sodium hydroxide solution, NaOH (aq). (Remember that KHP is potassium hydrogen phthalate, KHC8H4O4, NOT potassium hydrogen phosphorus!) B.) The student uses the same sodium hydroxide to titrate 10.00 mL of vinegar to a phenolphthalein end point. If the titration required 27.48 mL of sodium hydroxide, NaOH (aq), calculate the molar concentration of acetic acid, HC2H3O2 (aq), in the vinegar. C.) Calculate the mass percent of acetic acid, HC2H3O2 (aq), in the vinegar using the molar concentration for acetic acid, HC2H3O2 (aq), determined in part b and assuming the density of the solution is 1.01 g/mL.
- A sample of 18.5 grams of sodium phosphate is weighed out on a balance and prepared to a volume of 2.00 x 102 mL in water. What is the molarity of this aqueous solution of Na3PO4?Malic acid (C4H6O5) is a dicarboxylic acid that naturally occurs in the production of bignay wine. Maria was tasked to find out the acid content in a 200.0 mL wine sample by titrating it with a standardized solution of KOH. He was able to establish the working concentration of the KOH solution by using 39.12 mL of it to titrate a primary standard of KHP that weighed 3.021 g. The grams and %w/w of Malic acid present in the 200.0 mL wine sample were then determined by titrating a 20.00 mL aliquot using 48.95 mL of the standardized KOH solution. C4H6O5 (aq) + 2KOH (aq) ↔ K2C4H4O5 (aq) + 2H2O (l) Assume the density of the wine sample is 1.000 g/mL MM of KHP = 204.22 g/mol MM of C4H6O5 = 134.0874 g/mol ? What is the molar concentration of the prepared KOH solution?…Malic acid (C4H6O5) is a dicarboxylic acid that naturally occurs in the production of bignay wine. Maria was tasked to find out the acid content in a 200.0 mL wine sample by titrating it with a standardized solution of KOH. He was able to establish the working concentration of the KOH solution by using 39.12 mL of it to titrate a primary standard of KHP that weighed 3.021 g. The grams and %w/w of Malic acid present in the 200.0 mL wine sample were then determined by titrating a 20.00 mL aliquot using 48.95 mL of the standardized KOH solution. C4H6O5 (aq) + 2KOH (aq) ↔ K2C4H4O5 (aq) + 2H2O (l) Assume the density of the wine sample is 1.000 g/mL MM of KHP = 204.22 g/mol MM of C4H6O5 = 134.0874 g/mol What is the molar concentration of the prepared KOH solution?…
- The aluminum in a 2.200-g sample of impure ammonium aluminum sulfate was precipitated with aqueous ammonia as the hydrous Al2O3⋅xH2O. The precipitate was filtered and ignited at 1000°C to give anhydrous Al2O3, which weighed 0.3006 g. Express the result of this analysis in terms of a. %NH4Al(SO4)2 b. %Al2O3 c. %Al3. The concentration of acetylsalicylic acid, C9H8O4, in aspirin tablets is determined by hydrolyzing it to the salicylate ion, C7H5O3-, and de¬termining its concentration spectrofluorometrically. A stock standard solution is prepared by weighing 0.0774 g of salicylic acid, C7H6O3, into a 1-L volumetric flask and diluting to volume. A set of calibration standards is prepared by pipeting 0, 2.00, 4.00, 6.00, 8.00, and 10.00 mL of the stock solution into separate 100-mL volumetric flasks that contain 2.00 mL of 4 M NaOH and diluting to volume. Fluorescence is measured at an emission wavelength of 400 nm using an excitation wavelength of 310 nm with results shown in the following table. (a) Why is the excitation wavelength (310 nm) shorter than the emission wavelength (400 nm)?(b) How is the emission wavelength isolated from the excitation wavelength in a fluorescence instrument?A stock solution of potassium permanganate (KMnO4) was prepared by dissolving 20.8 g KMnO4 with DI H2O in a 100.00-mL volumetric flask and diluting to the calibration mark. Determine the molarity of the solution.