Chemistry question and answers for October 03, 2023
- Q 1.) Determine the initial concentration of a solution of theweak acid HClO2 , if it its pH is 1.20 and Ka = 1.10
- Q Howdoes the coordination of an actinide at a given oxidation vary withthe increase of ionic radius of halides?
- Q The reaction of methane with water to form carbon dioxide andhydrogen isnon-spontaneous at 298 K. Use the thermodynamic data from the table(it refers to 298 K) and determine at which...
- Q 1. in what context do the terms hydrophobic and hydrophilic relateto the soulubilites of substance in water?2. in each of the following pairs of compounds which compound islikely to be...
- Q 1) From the balanced molecular equations, write the completeionic and net ionic equations for the following. (Use the lowestpossible whole number coefficients. Include states-of-matter underthe given conditions in your answer.)a)...
- Q Part 1) Solvent trapping is used fora) analysis of trace components.b) analysis of high-boiling major components.c) analysis of low-boiling major components.Part 2) Open tubular columns of less than 0.53 mm...
- Q In the qualitative analysis scheme, magnesium and nickelprecipitate from solution upon the addition of sodium hydroxide.Once separated from the remaining cations by filtration ordecanting, the solid mixture is acidified and...
- Q Mechanism of AdsorptionAdsorption mechanism includes physical adsorption and chemicaladsorption.How well would the following compounds be adsorbed on (I)biochar and (II) clay?Na+NO3–Dioctyl phthalateExplain the answers in terms of physical adsorption and...
- Q achef prepares 350mL of simple syrup by dissolving 240g if sucrose(MW = 342 g/mol) in 250mL of water (density = 1.0g/mL). calculatethe concentration of sucrose in the resulting solution in...
- Q Contrast ideal vs. nonideal/real gases, and explain why veryhigh pressure and very low temperature gases behave nonideally. (6points)
- Q A beaker with 125 mL of an acetic acid buffer with a pH of 5.000is sitting on a benchtop. The total molarity of acid and conjugatebase in this buffer is...
- Q Complete the following table by calculating the missing entries.In each case indicate whether the solution is acidic or basic.pHpHpOHpOH[H+][H+][OH−][OH−]Acidic or basic?5.302.164.7×10−10 MM8.3×10−2 MMI need help on each row of these.
- Q Decide the mechanism by which the following alkyl halides willbe converted to alcohols by the substitution of the nucleophile,OH-.The options are: SN1, SN2, more information needed1-bromo-2,3-dimethylbutane2-chloro-2,3,3-trimethylbutane4-iodo-3-ethylhexane3-chloro-2,2-dimethylbutane
- Q A sample of KIO3 weighting 0.1040 grams was added to an HClsolution containing excess KI. The liberated I2 requried 34.6 mL ofNa2S2O3 solution in the titration. calculate the molarity of...
- Q Dimethyl ether Ch3-o-CH3 and ethanol ch3ch2oh have the samemolecular formula. Dimethyl ether evaporates faster than ethanol,which is at same temperature. Explain these observations??
- Q An ideal monatomic gas at an initial temperature of 500 K isexpanded from 5.0 atm to a final pressure of 1.0 atm. Calculatew, q, DU, and (where applicable)DH and DT...
- Q An experimental protocol calls for 25.4 mL of a solution inwhich the potassium ion concentration is 0.0872 M. How would you preparethis solution from pure solid potassium phosphate? (The solvent...
- Q Calculate the grams of NaCH3COO required for 150.0mL of 0.20 M CH3COOH solution to achieve a pH of 4.40.(Assume no volume change.)Â Â (Ka = 1.8 x10-5 )What is the pH of...
- Q As a chemist for an agricultural products company, you have justdeveloped a new herbicide,\"Herbigon,\" that you think has thepotential to kill weeds effectively. A sparingly soluble salt,Herbigon is dissolved in...
- Q A chemical equation (even a balanced chemical equation) is notable to tell us how the reaction actually occurs. However, we canpredict the rate law of a reaction, if we propose...
- Q List the different electron donating compounds thatprovide energy for the work done by biologicalorganisms?
- Q For the reaction below, Kp = 29.21 at 800K. Calculate theequilibrium partial pressures of the reactants and products if theinitial pressures are Ppcl5 = 0.488atm & Ppcl3 = .4900atm.PCL5(g) <---->...
- Q Question 12.12. The condensation of diatomic bromine (Br2) from agaseous to a liquid state releases 7.4 kcal/mol. What is the signof delta H for this process?PositiveNegative
- Q Where it occurs, write the hydrolysis of the anion/orcation.1) NH4I2) CH3COOLi3) CsCIO4
- Q An unknown Fe(II) sample is added to 2.50 mL of a 0.0300 Mpotassium dichromate solution (in acidic medium) in a 25 mLvolumetric flask. 2 M H2SO4 is added to fill...
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