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Chemistry
- Simple acids such as formic acid, HCOOH, and acetic acid, CH3COOH, are very soluble in water; however, fatty acids such as stearic acid, CH3(CH2)16COOH, and palmitic acid, CH3(CH2)14COOH, are water-insoluble. Based on what you know about the solubility of alcohols, explain the solubility of these organic acids.arrow_forwardA sample (50 mL) of a bottled water was added to a 100 mL volumetric flask and then diluted to the mark. From this stock solution, 50 mL was taken, added to a 100 mL volumetric flask and diluted to the mark. Final concentration of the serial dilution: 587.7161ppm. 1. what is the concentration in the original bottle (ppm)arrow_forwardA concentration of toxic metals in plant tissue is often found by combusting the material in a furnace and then dissolving the ash in concentrated acid. A 0.5124-gram sample of leaves was combusted to ash and transferred to a 150-mL beaker. A 25-mL portion of concentrated HCl was added and the mixture was heated on a hot plate. Three 5-mL portions of concentration HCl were added over approximately 10 minutes with continued heating in between additions. The resulting mixture was cooled to room temperature and filtered into a 50-mL volumetric flask, which was brought to volume using distilled water and mixed well. From this stock solution, a 10-mL portion was pipetted into a clean 50-mL volumetric flask, brought to volume with distilled water, and mixed. This final solution was analyzed and found to contain 12.1 ppm lead. What are the mass percent of lead in the original plant tissue?arrow_forward
- Hydrogen peroxide solutions can easily be decomposed by dust, trace amounts of metals or light. It istherefore necessary to periodically determine the purity of the peroxide solutions.This can be done via a redox titration as follows: The density of a particular surgical grade hydrogen peroxide solution is 1.11g.cm-3. Exactly 10 mL of this solution was pipetted and quantitatively transferred, along with a sufficientamount of a dilute sulphuric acid solution, into a 250.00 mL volumetric flask and made up to the mark. A 25.00 mL portion of this diluted solution is pipetted into a conical flask, and titrated with a0.372 M KMnO4 solution. The endpoint of the titration is determined when the colourless solution in the conical flask turns apersistent bright pink due to the presence of excess permanganate ions. The average titration value is 26.20 mL of the KMnO4 solution 1.Determine the percentage of the hydrogen peroxide in the solution sample.2. Naturally occurring manganese…arrow_forwardCopper(I) ions in aqueous solution react with NH3 (aq) according to Cu+ (aq) + 2 NH3 (aq) · → Cu(NH3)2(aq) K₁ = 6.3 × 1010 Calculate the solubility (in g·L-¹) of CuBr(s) (Ksp = : 6.3 × 109) in 0.74 M NH3(aq). solubility of CuBr(s): g/Larrow_forwardOne way of obtaining pure sodium carbonate is through the decomposition of the mineral trona, Na,(CO,),(HCO,) 2H,0, Na,(Co,),(HCO,) 2H,0(s) → 5Na,cO,(s) + CO,(g) 3H,0(g) + When 1.00 metric ton (1 × 10° kg) of trona is decomposed, 0.74 metric ton of Na,co, is recovered. What is the percent yield of this reaction? Select one: a. 93% 19 b. 22% С. 83% d. 43% е. 17%arrow_forward
- 0.376 grams of KHP are placed in an Erlenmeyer flask and some water and a drop of phenolphthalein is added to the flask. The buret is filled with an NaOH (aq) solution of unknown concentration. The NaOH solution is added dropwise to the flask containing KHP (aq). After 12.78 mLs of the NaOH(aq) solution is added, the color of the solution is found to be faintly pink. What is the concentration (M) of the unknown NaOH solution based on this data alone?arrow_forwardASAParrow_forwardA solution of 118 mL of 0.200 M KOH is mixed with a solution of 300 mL of 0.190 M NiSO4. Write the balanced chemical equation for the reaction that occurs. Express your answer as a balanced chemical equation. Identify all of the phases in your answer.arrow_forward
- A forensic chemist is given a white powder by the investigator of a crime scene. The investigator wants to know if the powder is a pure substance or a mixture. The chemist dissolves some of the powder in deionized water making a clear solution. She finds that a precipitate forms when she adds an excess aqueous solution of sodium chloride. She filters the precipitate and washes it several times with deionized water. To this filtrate she then adds an aqueous solution of sodium carbonate. A precipitate forms. Question: Draw two pictures representing a molecular / atomic / ionic view of what occurred when a precipitate formed with the addition of sodium chloride solution. Choose the type of particle that is the most appropriate for this reaction. Place charges on any ions indicating charge values (+1, -2, etc.) when they are known. If charges are unknown indicate whether the ion is positive or negative. Clearly indicate which picture represents before the reaction occurs. Should…arrow_forwardUse this information to calculate Ka, for Ag, CO3. The solubility of Ag,CO, in water at 25 °C is measured to be 0.035 sp. Round your answer to 2 significant digits.arrow_forwardWrite the equilibrium constant for C(s) + 2H2(g) ↔ CH4(g)arrow_forward
- Chemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning