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A 15.00 mL sample of hydrofluoric acid, Ka=6.8 x 10^-4, was titrated with 0.475 M KOH. The equivalence point was reached after addition of 19.35 mL of base. Determine the molar concentration of the original hydrofluoric acid solution, and find the pH of the original hydrofluoric acid solution.
A calorimeter contains 125 g of water at 26.1°C. A block of metal with a mass of 25 g is heated to 96.5°C and then placed in the water in the calorimeter.
when 31 mL of 0.200 M HCl has been added to 39 mL of 0.0500 M NH3 solution? HCl is strong acid, Kb = 1.8 × 10-5 for NH3
For the spectrum labeled as DBABA come up with a valid structure for a molecule likely leading to the given spectrum. The molecular formula is C15H23NO. Is a benzene ring present?
A 3.00 L helium balloon, initially at STP, floats up to an altitude of 10 km, where the pressure is 200.0 torr and the temperature is -45°C. What is the balloon's new volume?
A reverse osmosis unit is used to obtain drinkable water from a source that contains 0.740 g NaCl per liter. What is the minimum pressure (in torr) that must be applied across the semipermeable membrane
Formulate a reaction mechanism to show how, with excess acetic anhydride ,2-methyl benzisoxazinone might be formed.(Hint: acetylation of the amino group should occur first). How many moles of acetic anhydride are consumed in this reaction?
How many liters of HCl at 100.0 oC and 740 mm Hg are produced from 150.0 g of C10H16?
Determine the numbers of moles of S8 that are required to make 0.600 moles of SF4.
Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and that the alcohol vaporizes at 25°C.
the Fischer esterification experiment why was the majority of the ethanol boiled off prior to extraction and why was the reaction vial cooled
What fraction of the SbO+ will be reduced to the elemental (Sb) state under the experimental conditions imposed in part (a)?
If the concentration of bromide ion in a saturated solution in equlibrium with PbBr2 solid is determined to be .0125M what is the solubility of PbBr2
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