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1) The venom of biting ants contains formic acid, HCOOH (Ka=1.8*10^-4 at 25 C). what is the pH of a 0.065 M solution of formic acid?
2) Calculate the pH of 1.00 L of a buffer that is 0.140 M HNO2 and 0.180 M NaNO2. What is the pH of the same buffer after the addition of 1.00 mL of 12.0 M. HCl. (pKa of HNO2 = 3.40). What is the pH of the Original buffer and after HCl is added?
How do the values of delta G compare to those calculated from delta H and delta S? which of these two methods could be used to determine how delta G changes with temp?
What is the partial pressure of each substance if the total pressure of the mixture is 2.35 atm?
reacting 5g of salycic acid with an excess of acetic anhydride
By definition, which of the following can be broken down into simpler substances?
Determine Ssys separately for the volume and temperature changes and show that ?Ssys = 0 for a reversible adiabatic process. If the expansion had instead occurred irreversibly against a constant external
A .76g sample of polyvinyl chloride (PVC) is dissolved in 250mL of a suitable solvent at 25C. the solution has an osmotic pressure
The mass of the water in the inner bath is 1.40×103g . The temperature of the calorimeter and its contents rises 2.83K as a result of this reaction. Calculate the calorimeter constant.
What type of feature will be observed in the EI mass spectrum of chlorobenzene? A) A signal at 112 and a signal at 114 in a ratio of 3:1
Organic Chemistry Lab: Reduction and Spectroscopy, 1. Sketch the NMR spectrum you would expect to observe for the following compounds:
A 49 gram sample of impure potassium nitrate (KNO3) was heated to complete decomposition according to the equation 2 KNO3(s) → 2 KNO2(s) + O2(g) After the reaction was complete.
If the pressure of gaseious chloroform in a flask is 195 mm Hg at 25 degrees celsius and its density is 1.25 g/l, what is the molar mass of chloroform?
When 9.00 grams of Al react with an excess of H3PO4, 30.0 grams of ALPO4 are produced.What is the percentage yeild of this reaction.
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