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Consider titrating 15.0ml of a .245M solution of hydazine, H2NNH2, with a .453M HCl solution. The Kb value for hydrazine is 1.3x10^-6 b) what volume of HCl needs to be added to the solution in oder to have a bffer system with the maximum capacity for added acid or base? c) what is the pH of the solution before any HCl has been added? d) what is the pH of the solution after the addition of 3.0 ml of HCl? e) What is the pH of the solution at the equivalence point? f) what is the pH of the solution when 5.0ml more of the HCl solution is added after the equivalence point has ben reached?
Describe how and why the ferric chloride test can be used to detect whether your reaction has gone to completion.
A bottle containing 345 g of cleaning solution is used for carpets. If the cleaning solution has a specific gravity of 0.850, what volume of solution was used?
An aqueous antifreeze solution is 40.0% ethylene glycol (C2H6O2) by mass. The density of the solution is 1.05 g/cm3. Calculate the molality, molarity, and mole fraction of the ethylene glycol.
Two of these students will report, within experimental error, the same increase in solution temperature for the neutralization. Which are the two students? Explain.
What is the percent yield of a reaction in which 200 g phosphorus trichloride reacts with excess water to form 82 g HCl and aqueous phosphorus acid (H3PO3)
These two substances reach thermal equilibrium at a temperature of 64.2 degree celsius. If the specific heat capacity of substance "B" is 1.17 J / g-C, what is the specific heat of substance "A". (assume no heat is lost to the surroundings)
calculate the ph of a solution that is made by combining 125 ml of 0.050 M hydrofluoric acid with 50 mL of 0.10 M sodium fluoride
A flask of unknown volume was filled with air to a pressure of 3.23 atm. This flask was then attached to an evacuated flask with a known volume of 8.00 L, and the air was allowed to expand into the flask.
Each atom in HF has a fractional charge of 0.416. What is the dipole moment of HF? 2. Which of the following molecules has a dipole moment? 3. Of the ions below, which ion has the smallest atomic radius?
In a Fisher Esterfication Experiment the reaction product was extracted with 5% sodium bicarbonate solution (NaHCO3) in the isolation step. Why?
A 100.0 g copper sample (specific heat = 0.385 J/goC) at 100.0oC is added to 50.0 g water at 26.5oC. What is the final temperature of the copper-water mixture?
The normal melting point of benzene is 5.5 degrees Celsius . For the process of freezing, what is the sign for each of the following
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