If you have 6.68 g of caffeine dissolved in 66.64 mL of water and the extraction coefficient between H₂O and CH₂Cl₂ is 21.51. How many grams of caffeine will extract into the CH₂Cl2 layer if you add 93.06 mL? Please provide your answers with two decimal places.
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- A 1.00 liter solution contains 0.58 moles hypochlorous acid and 0.45 moles sodium hypochlorite . If 0.22 moles of nitric acid are added to this system, indicate whether the following statements are true or false. (Assume that the volume does not change upon the addition of nitric acid.) VA. The number of moles of HCIO will remain the same. vB. The number of moles of CIO" will decrease. vC. The equilibrium concentration of H30+ will increase. D. The pH will remain the same. vE. The ratio of [HCIO] / [CIO¯] will remain the same.The KHP titer of NaOH is 40.84mg/mL. Determine total acidity if 18.00mL of NaOH is required to titrate 5.00mL vinegar sample. Give the chemical reactions involved.How do i calculate the volume of NaOH standard solution needed to completely react with the acetic acid, assume that vinegar has a density of 1g/mL and 5% by weight acetic acid.
- A 1.00 liter solution contains 0.48 M ammonia and 0.37 M ammonium iodide. If 0.18 moles of hydrobromic acid are added to this system, indicate whether the following statements are true or false. (Assume that the volume does not change upon the addition of hydrobromic acid.) A. The number of moles of NH3 will decrease. B. The number of moles of NH4+ will decrease. C. The equilibrium concentration of H3O+ will decrease. D. The pH will remain the same. E. The ratio of [NH3] / [NH4+] will decrease.A 1.00 liter solution contains 0.59 M ammonia and 0.45 M ammonium bromide.If 0.23 moles of perchloric acid are added to this system,indicate whether the following statements are true or false.(Assume that the volume does not change upon the addition of perchloric acid.) A. The number of moles of NH3 will increase. B. The number of moles of NH4+ will remain the same. C. The equilibrium concentration of H3O+ will decrease. D. The pH will remain the same. E. The ratio of [NH3] / [NH4+] will remain the same.Calculate the mass of KBr required to be dissolved in 1.25 L solution that has 3.21 M concentration.
- A 2.500g sample of a mixture of sodium hydrogen carbonate and potassium chloride is dissolved in 41mL of 0.4269M H2S04. Some acid remains after treatment of the sample. If 31.89mL of 0.2653M NaOH were required to titrate the excess sulfuric acid, how many moles of sodium hydrogen carbonate were present in the original sampleA 1.00 liter solution contains 0.36 moles hydrofluoric acid and 0.28 moles sodium fluoride .If 0.14 moles of hydroiodic acid are added to this system, indicate whether the following statements are true or false.(Assume that the volume does not change upon the addition of hydroiodic acid.) A. The number of moles of HF will remain the same. B. The number of moles of F- will decrease. C. The equilibrium concentration of H3O+ will increase. D. The pH will remain the same. E. The ratio of [HF] / [F-] will remain the same.Which of the labelled protons generates the 'H NMR signal at 10.96 ppm, singlet, integration of 1? HC HC a H C CH N CH OH NH H HO=0 b H CH 어 CH С
- A chemistry student weighs out 0.270 g of citric acid (H;C,H;O,), dilutes to the mark with distilled water. He plans to titrate the acid with 0.1600M NAOH solution. a triprotic acid, into a 250. mL volumetric flask and Calculate the volume of NaOH solution the student will need to add to reach the final equivalence point. Be sure your answer has the correct number of significant digits. |mL I ml ?This question is about acid base titration: Osama a student, performed an acid base titration involving a standard solution of Sodium hydroxide (NaOH) (RMM = 40) against unknown HCl solution and obtained the following results. Mass of Sodium hydroxide (NaOH) dissolved in 250 ml volumetric flask = 3.6 g 2.Volume of Sodium hydroxide used in the titration = 23 ml 3.The mean volume of HCl titrated with 25 ml Sodium…In a Back titration of sodium carbonate with sulfuric acid and sodium hydroxide, how would I calculate the amount of mmol for sodium carbonate?