Which type of chemical reaction does the reaction below represents? CH4 + 2O2 ------------> CO2 + 2H2O Group of answer choices synthesis double replacement combustion decomposition 2. As molarity and its equivalents were multiplied, the concentration represents formality normality mole fraction molality

Which type of chemical reaction does the reaction below represents? CH4 + 2O2 ------------> CO2 + 2H2O Group of answer choices synthesis double replacement combustion decomposition 2. As molarity and its equivalents were multiplied, the concentration represents formality normality mole fraction molality

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter17: Electrochemistry

Section: Chapter Questions

Problem 80AP

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A 0.4723-g sample of primary-standard-grade Na2CO3 required 34.78 mL of an H2SO4 solution to reach the end point in the reaction CO32- + 2H+ → H2O + CO2 (g) What is the molar concentration of the H2SO4?
How many electrons are being transfer in the following unbalanced reaction Fe + O2 --> Fe2O3?
To remove the tarnish (Ag2S) on a silver spoon the following steps are carried out. the spoon is placed in a large pan filled with water so the spoon was totally immersed. A few tablespoonfuls of baking soda (sodium bicarbonate), which readily dissolves. Is added. Some aluminum foil is placed at the bottom of the pan in contact with the spoon and then heated the solution to about 80° After a few minutes, the spoon is removed and rinsed with cold water. The tarnish is gone and the spoon regains its original shiny appearance. Describe with equations the electrochemical basis for the procedure. Adding NaCl instead of NaHCO3 would also work because both compounds arestrong electrolytes. What is the added advantage of using NaHCO3? (Hint: Consider the pH of the solution.) What is the purpose of heating the solution? Some commercial tarnish removers containing a fluid (or paste) that is a dilute HCl solution. Rubbing the spoon with the fluid will also remove the tarnish. Name two…
-NEUTRALIZATION REACTIONS Can you help me with this one? The given problem is in the image that I've attached 1. Based on the given problem, What is the molecular weight of potassium biphthalate (C8H5KO4)? 2.Based from the given problem, what is the mEq of potassium biphthalate? 3.Based from the given problem, what is the Normality of the sodium hydroxide solution? Would you please provide a separate solution to each question, thankyou! Here are the instructions on how will you write the answers: 1. All answers to be entered via short answer are in the NUMERICAL FORMAT and presented up to the 3rd decimal place. ADD TRAILING ZEROS if necessary, to complete your answer. NO NEED TO INCLUDE THE UNIT for now.For uniformity of answers, please be guided by the following examples:- If your answer is 5.627594, enter 5.628- If your answer is 3.129934, enter 3.130- If your answer is 8.38, enter 8.380- If your answer is 1.2, enter 1.200- If your answer is 25, enter 25.000- If your answer is…
MnSO4•H2O is soluble in water at 25°C, with a solubility of 70.0 g per 1000 g of solution. A saturated solution of MnSO4•H2O has a density of 1.02 g mL-1. When MnSO4•H2O dissolves in water, it absorbs roughly 3.05 kJ/mol of energy. MnSO4•H2O = 169.03 g/mol; H2O = 18.02 g/mol; MW: MnSO4•H2O = 169.03 g/mol. Which of the following is TRUE about a 0.32 M solution of MnSO4•H2O in water? a. A 0.32 M solution contains 70.0 g MnSO4•H2O b. A 0.32 M solution of MnSO4•H2O is unsaturated c. A 0.32 M solution of MnSO4•H2O is supersaturated d. A 0.32 M solution of MnSO4•H2O is saturated
Aircraft de-icing agents, such as propylene glycol [1,2-propanediol; CH₃CH(OH)CH₂OH; d=1.036 g/mL], are used toremove ice and snow prior to winter flights, but their presence inrunoff depletes O₂ in natural waters. (a) Write a balanced equa-tion for the complete oxidation of propylene glycol by O₂.(b) What is the “theoretical oxygen demand,” in grams of O₂ required per gram of propylene glycol oxidized? (c) What is thetheoretical oxygen demand, in grams of O₂ required per liter ofsolution, of 90.0% by volume aqueous propylene glycol?
Solution and explanation for Percentage Yield and Theoritical Yield for this data (Synthesis of Aspirin) Salicylic acid - 1.950 g Labeled watch glass - 50.664 g Labeled watch glass & piece of filter paper together - 50.872 g filter paper only - 0.208 g Where the data is from: https://youtu.be/tLXljLxRZ0U Room temperature - filter paper, watch glass and aspirin - 53.088 g
TOPIC: GRAVIMETRY SHOW THE SOLUTION The mercury in a 0.7152-g sample was precipitated with an excess of paraperiodic acid, H5IO6, according to the following reactions:5 Hg+2 + 2 H5IO6 ---> Hg5(IO6)2(s) + 10 H+The precipitate was filtered, washed free of precipitating agent, dried and found to weigh 0.3408-g. Calculate the percentage of Hg2Cl2 in the sample. Molar Masses: Hg5(IO6)2 = 1448.75 Hg2Cl2 = 472.09 Answer: 38.82% Hg2Cl2 An iron ore was analyzed by dissolving a 1.1324-g sample in concentrated HCl. The resulting solution was diluted with water, and the iron (III) was precipitated as the hydrous oxide Fe2O3·xH20 by the addition of NH3. After filtration and washing, the residue was ignited at a high temperature to give 0.5394 g of pure Fe2O3. Calculate (a) % Fe, and (b) % Fe3O4 in the sampleMolar Masses: Fe2O3 = 159.69 Fe = 55.847 Fe3O4 = 231.54 Answer: 33.32% Fe and 46.04% Fe3O4
1. What is the gravimetric factor of SO3 in BaSO4? 2. What is the normality of an oxidizing agent of a solution of potassium dichromate (K2Cr2O7) containing 8.906 g per 200 mL in the presence of acid? (Cr2O7-2 + 6Fe+3 + 14H+ → 2Cr3+ + 6Fe3+ + 7H2O) NOTE: Present complete solution with corresponding units.
What is the molarity of a solution in which 150g of CaO are dissolved in 1900mL of solution? (Use thefollowing given information: overline MW:Ca=40g/mol , O=16g/molA. 1.41 mol/LB. 0.0014 mol/LC. 0.0014 MD. 1.41 m
Over time, as their free fatty acid (FFA) content increases,edible fats and oils become rancid. To measure rancidity, the fator oil is dissolved in ethanol, and any FFA present is titrated withKOH dissolved in ethanol. In a series of tests on olive oil, a stocksolution of 0.050 Methanolic KOH was prepared at 25C, storedat 0C, and then placed in a 100-mL buret to titrate any oleic acid[CH₃(CH₂)₇CH=CH(CH₂)₇COOH] present in the oil. Each offour 10.00-g samples of oil took several minutes to titrate: thefirst required 19.60 mL, the second 19.80 mL, and the third and fourth 20.00 mL of the ethanolic KOH.(a) What is the apparent acidity of each sample, in terms of mass% of oleic acid? (Note:As the ethanolic KOH warms in the bu-ret, its volume increases by a factor of 0.00104/C.)(b) Is the variation in acidity a random or systematic error? Ex-plain.(c) What is the actual acidity? How would you demonstrate this?
A commercial product designed to prevent cut fruit from turning brown contains a mixture of ascorbic acid (HC6H7O6) and sugar (C12H22O11). Calculate the percent (w/w) of ascorbic acid in this product if a 2.1994 g portion of this product requires 36.15 mL of 0.2328 M NaOH to reach a phenolphthalein endpoint. MM HC6H7O6: 176.12 MM NaOH: 40.00