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How much heat is associated with the dissociation of a weak acid, NaHSO4 in water? HSO4^-+H20 >>> H3O^+ + SO4^2-? (not sure if this is a seperate part?) Is this dissociation exothermic or endothermic? Questions (regarding bomb calorimetry): 1. Why do we use slightly different amounts of acids (HCL and NaHSO4) from the amounts of base (NaOH)? 2. In what order should you mix the acid and base? Would you pour acid into base, or is the opposite true? Does it matter? 3. When should you start and stop monitoring the temperature? How will the initial and final temperatures be determined?
A buffer is prepared by mixing 500 ml of 0.4 M Na2HPO4 and 500 ml of 0.2 M NaH2PO4 (pK1 = 2.10; pK2 = 6.70; pK3 = 12.30). Calculate the pH of this buffer.
Calculated what is the pressure in atm using the van der Waals' equation for Oxygen gas under these conditions? For O 2 , it is given a = 1.360 L2atm/mol2 and b = 3.183E-2 L/mol.
Compute the pH of a solution formed by adding 14.1 g of baking soda (sodium bicarbonate) to enough water to make a 190.0 mL solution
A reaction mixture initially contains 0.86 M NO and 0.86 M S03. Determine the equiibrium pressure of NO2 if Kc for the reaction at this temperature is 0.0118.
The freezing point (Tf) for t-butanol is 25.50°C and Kf is 9.1°C/m. Usually t-butanol absorbs water on exposure to the air. If the freezing point of a 9.2-g sample of t-butanol is measured as 24.59°C, how many grams of water are present in the sam..
Examine the bioenergetics of the synthesis of glutamine synthesis from alpha ketogluterate via glutamate synthase or glutamate deyhydrogenase
A steel tank with a volume of 9.583 L contains N2 gas under a pressure of 4.972 atm at 31.8 °C. Calculate the number of moles of N2 in the tank.
Distinguishing between Organic Molecules, What chemical tests might be used to distinguish between: pentanal and 2-pentanone, between benzyl alcohol and diphenylmethanol?
A 2.9 m solution of methanol (CH3OH) in water has a density of 0.984 g/ml. What are the a) mass percent, b) molarity, and c) mole fraction of methanol in this solution?
When adding the solution of HNO3 from the buret in Step 14 to beaker 4, you know that you added 2.5 mL instead of 1.5 mL for a total volume of 11.0 mL. How would the calculated value of the equilibrium constant be affected for this sample?
What concentration of naphthalene in grams per liter would be needed to give an absorbance of 1.0 at 220nm
The energy of a photon is 9.61 x 10 ^ -20 J . What is its wavelenght( in nanometers)? Enter your answer in scientific notation
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