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A buffer is prepared using the propionic acid/propionate acid-base pair for which the ratio (of acid to base) is 4.50.
(a) Enough strong base is added to convert 27% of HC3H5O2 to C3H5O2-. What is the pH of the resulting solution?
(b) Strong base is added to increase the pH. What must the acid/base ratio be so that the pH increases by exactly one unit from a pH of 4.20?
A 10 mL aliquot of a 10 M solution diluted to 250 mL A 25 mL aliquot of a 10 M solution diluted to 250 mL A 57 gram beaker that weighs 82 grams after NaCl is added transfers all of the NaCl into a 100 mL volumetric flask and dilutes it to the mark..
Calculate the percent dissociation of the acid to 3 significant figures. % ============= 2. The pH of a 4.28×10-3 M solution of a weak base that will accept only one proton is 7.17. Calculate the percent dissociation of the base to 3 significant f..
when most Fe+3 salts are dissolved in dilute nitric acid, the solution is often yellow to orange in color. Why could you not visually detect these colors in the Fe(NO3)3 stock solution?
In acidic aqueous solution, water can be oxidized to O2 gas, and the H+ ions. What is the voltage (emf) of this half-reaction, under standard conditions. And what gas is produced at the anode
Ionization energy is the energy required to remove an electron from an atom in the gas phase. The ionization energy of tin is 708.0 kJ/mol. Calculate the maximum wavelength of light that will ionize tin.
What is the electron geometry. 3. What is the molecular geometry. 4. What are the hybridized orbitals. 5. Is the molecule polar or non-polar
What volume of a stock 0.0242 M of KOH solution is required to titrate 0.147 g of oxalic acid dehydrate, H2C2H4 . 2H2O to a phenolphthalein endpoint?
Hypervenilation raises the pH of the blood in a condition known as respiratory alkalosis. Common treatment is to have the patient breathe into a paper bag,
Draw all possible mesomeric structures of the carbocationic intermediate in the chlorination of benzoic acid. Explain why the main product is m-chlorobenzoic acid.
the vapor pressure of pure water at 70degc is 235 mm hg. what is the vapor pressure depression of a solution of 125 g
What concentration of CO3^2- is need to initiate precipitation. Neglect any volume changes during the addition.
The standard free energy change for the reaction of nitrogen gas with hydrogen gas to produce ammonia is -32.9 kJ. Calculate the equilibrium constant for this reaction at 25°C.
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