Ethane is oxidized to carbon dioxide in the presence of nitrate (NO3'). The redox potential for the redox pair CO2/C2H6 is -0.48 volts. The redox potential of the redox pair NO3:/NO2'is 0.42 volts. What is AG for the reaction?
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- 2. The following question tests your lab skills as well as basic knowledge understanding: In Lab1- KHP Determination, 0.85 g moisturized NaOH (M.W.= 40.01 g/mol) solid was dissolved in 500.0 mL of water. 24.21 mL of this NaOH solution was consumed to reach the equivalence point when titrated with 0.2021 g of pure KHP (M.W.=204.22 g/mol. Solid was fully dissolved in 50 mL deionized water). (a). Please write the reaction equation (balanced). Then calculate the precise concentration of NaOH solution. List all steps. (b). What are the primary standard and secondary standard material in the above operation respectively? (c). During the above operation, what glassware/tools were used to measure 0.85 g NaOH, to store 1 liter NaOH solution, to measure pure KHP solid, to conduct the titration, respective ? (d). Can this titration be used to measure the pH value of an unknown solution? Why or why not? (e). Did we use a pH buffer solution in the…1. What is a “dNTP” and why are they included in the reaction mixture? 2. What will be the final concentration of 25 mM MgCl2, 5 mM dNTPs, and each 25 µM primer in one of the reaction tubes with the final volume of 50 microliters? Hint: use the information in the left column of Table 1 to help you with these calculations. (For one reaction) item 5.25x master mix – add things in order 32.7 µl ddH2O 171.7 µl 10 µl 5x reaction buffer 52.5 µl 3 µl 25 mM MgCl2 15.75 µl 0.5 µl 5 mM dNTPs 2.63 µl 1 µl 25 µM “forward” primer (#3012) 5.25 µl 1 µl 25 µM “reverse” primer (#3013) 5.25 µl 0.8 µl thermostable polymerase 4.2 µl (do not add until needed) Total: 49 µl Total: 257.3 µlPotassium nitrate is widely used in industries. The reaction for the industrial production of KNO3 is summarized in the equation below; 4KCl + 4 HNO3 + O2 → 4 KNO3 + 2 Cl2 + 2 H2O Which of the following statements below is correct about the production of KNO3? a. A redox reaction; KCl is a reducing agent and O2 is an oxidizing agent b. A redox reaction; HNO3 is a reducing agent and Cl is an oxidizing agent c. Not a redox reaction d. A redox reaction; KCl is a reducing agent and KNO3 is an oxidizing agent e. A redox reaction; HNO3 is a reducing agent and KNO3 is an oxidizing agent
- When the temperature rises from 100°C to 145°C, the rate of a certain reaction increases by 3.7. 1) Calculate the reaction's activation energy in J/mol 2) Determine the ratio between the rates at 100°C and 45°C?A certain first order reaction has the rate law Rate = k[A] with k=0.0068 sec-1. If the initial concentration of A is 0.75 M, what will be the concentration of A after 1 minute? What is the half-life for this reaction? How much time will it take for 75% of A to react? How much A will be left after the passage of three half-lives? What is the initial rate of the reaction?Which of the following is the best way to judge the relative activation energies between two given chemical reactions? Compare the ?G values between the two reactions Compare their reaction rates Compare their ideal environmental conditions Compare the spontaneity between the two reactions.
- The following chemical reactants produce the ester ethyl ethanoate (C4H8O2): C2H6O + CH3COOH What type of reaction occurs to make ethyl ethanoate? condensation hydrolysis combustion acid-base reactionWhich of the following comparisons or contrasts between endergonic and exergonic reactions is false? Endergonic reactions have a positive ?G and exergonic reactions have a negative ?G Endergonic reactions consume energy and exergonic reactions release energy Both endergonic and exergonic reactions require a small amount of energy to overcome an activation barrier Endergonic reactions take place slowly and exergonic reactions take place quickly.A cation has a(n) ________ charge. neutral positive alternating negative
- The reaction quotient is Q=1.6×10-26 Part B What pH is needed to produce this value of Q if the concentration and pressure values are [Br2]=2.50×10−4M , [Br−]=11.65M, [SO42−]=9.50M, and PSO2=3.50×10−5atm ? Express your answer numerically to two decimal places.5. In the Chemical Changes experiment (E3) on copper, which of the steps can be omitted if our goal is only to obtain dry copper(II) oxide solid? a. Decanting and adding sulfuric acid to dissolve black precipitate b. Addition of NaOH to Cu(NO3)2 solution c. Filtering and heating until dry and fully black d. Boiling of previous solution until black1. Show the complete mechanism for the following reaction 2.) What other method or reaction also reduces benzophenone to diphenylmethane generating few pollutants to keep the environment green? Write the complete reaction.