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Although acetanilide and phenacetin are not appreciably acidic, acetaminophen (like aspirin) is a stronger acid than water. What problem would you encounter if the unknown component was acetaminophen rather than acetanilide or phenacetin, and you extracted the aspirin with 5 % NaOH? Explain, giving equations for any relevant reactions.
An unknown sample (0.7844g) containing KHP is titrated to the equivalence point with 9.2mL of 0.0811M NaOH. How many moles of KHP are present
titrating an unknown weak acid you hope to identify. Your titrant is a 0.0935 mol/L NaOH solution, and the titration requires 21.8 mL to reach the equivalence point. How many moles of acid were in your sample?
Calculate the pH of the solution that results when 40.0 mL of 0.100 M NH3 is mixed with 20.0 mL of 0.250 M HCl solution.
Water has a considerably higher boiling point and lower vapor pressure than other molecules of similar or larger molar mass. For example, dinitrogen (N2), methane (CH4), etc.
A 150 g sample of water (initially at 45.0oC)is mixed with a 200 g sample of water (initially at 84.0oC). Find the final temperature of the system
In standardizing an unknown NaOH solution, 21.50 mL of NaOH solution are found to reach the endpoint in a titration with 0.792 g of KHP. (MW= 204.32.0 g/mol) What is the molarity of the NaOH solution
A piece of silver is dropped in a container of water, write net ionic equation
Calculate the pH at the equivalence point in titrating 0.100 M solutions of each of the following with 8.0×10-2 M NaOH. A:lactic acid
Recall from class that we estimated the pi bond in ethylene to be about 350 kJ/mol. Use the same approach to estimate the strenghth
Determine the enthalpy change for the following reaction below using (a) standard enthalpies of formation, and (b) average bond energies. Explain why the two values might be different.
The equilibrium constant of the water-gas-shift reaction is 200, and the mole fraction of hydrogen at the outlet is 0.75. Using the extent of reaction method, how much additional steam is fed into the water-gas-shift reactor?
4 PH3(g) -> P4(g) + 6 H2(g) If, in a certain experiment, over a specific time period, 0.0039 mol PH3 is consumed in a 1.8 L container during each second of reaction.
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