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Part A: Thymolphthalein is an indicator that changes color over a range from pH = 9.3 to pH = 10.5 . What is Ka of thymolphthalein? Part B: Alizarin yellow R, Ka=7.9x10^-12, is yellow in its protonated form (HX) and red in its ionized form (X-). At what pH will alizarin yellow R be a perfect orange color?
A freshman studying medicine at an Ivy League College is a part of his class crew team and exercises regularly. After a particularly strenuous exercise session, he experiences severe cramps in his thighs and pain in his biceps.
Using curved arrows to symbolize electrons, write a complete reaction mechanism for the bromination of acetanilide to create p-bromoacetanilide.
What is mass percent (%w/w) of H2SO4 in this solution? (b) Would the mass percent (%w/w) of H2SO4 change with changes in temperature? Explain.
Given the Rydberg constant of -2.18x10^-18 J, Calculate the wavelength of the emitted photon for the first transition (highest energy) in each series.
The weight of your 1285-kg car is supported equally by its four tires, each inflated to a gauge pressure of 36.0 lb/in2. What is the area of contact each tire makes with the road?
The vapor pressure of chlorine dioxide (ClO2) is 155 Torr at -22.75 ? C and 485 Torr at 0?C. What is the normal boiling point of chlorine dioxide?
calcualte the pH at one-half the equivalence pont and at the equivalence point for a titration of 50 mL of 0.100M acetic acid with 0.100M NaOH
Assume that sucrose is a molecular solid and does not ionize when it dissolves in water. Kf values are given here.
How will the melting point of your semicarbazone derivative be affected if the derivative is not dry enough
A gaseous fuel mixture contains 23.0% methane CH4, 44.0% ethane C2H6 and the rest propane C3H8 by volume. When the fuel mixture contained in a 1.53L tank, stored at 748 mmHg and 298 K, undergoes complete combustion, how much heat is emitted
Acetic anhydride is formed from acetic acid in a condensation reaction that involves the removal of a molecule of water from between two acetic acid molecules. Write the chemical equation for this process.
Hydrocarbons are often reacted with steam to form H2, as shown for propane: C3H8(g) + 6 H2O(g) 3 CO2(g) + 10 H2(g) Calculate Kp for this reaction at a particular temperature
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