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A 1.00 Gram sample of an unknown acid is dissolved in water and titrated with 0.150 N KOH to the Phenolphthalein endpoint. It takes 28.32mL of base to complete this titration. A second sample of this acid weighing 2.00 grams is added to the titrated sample and the pH is 4.32. Calculate the molar mass of the unknown acid and determine the value of Ka for this acid.
What is the equation for Coulombic force and why is it important in chemistry? 4. What is the charge on the chloride ion and why does it have this charge
A gas expands and does P-V work on the surroundings equal to 281 J. At the same time, it absorbs 216 J of heat from the surroundings. What is the change in energy of the system?
Suppose polyethylene molecules in a solution can exist in either a random-coil conformation or in a fully stretched-out conformation. The stretched-out conformation is 2.4 kJ/mol higher in energy than the random-coil conformation.
what is the K value for compound Z in the biphasic system, 2) how much do you remove in each individual extraction
Calculate the mass of butane needed to produce 89.8g of carbon dioxide. express the mass of butane numerically
How much heat is required to convert 47 g of ethanol at 36 degrees Celsius to vapor phase at 78 degrees Celsius?
Calculate the total enthalpy change in the first stage and in both stages
Draw the major and minor products generated in the reaction of 1-Bromo-3methylene-cyclopentane in methyl alcohol and heat.
Determine the mass of CO_2 produced by burning enough carbon (in the form of charcoal) to produce 490 kJ of heat.
solution of a weak monoprotic acid, pKa 2.346, is mixed with 37.3 ml of 0.0832M sodium hydroxide. What is the pH of the resulting not a simple buffer solution?
The standard enthalpy of formation of the metallocene bis(benzene)chromium was measured in a calorimeter. It was found for the reaction Cr(C6H6)2(s) → Cr(s) + 2 C6H6(g)
The johns family has a water tank that can deliver 10,000 cu ft of CO2 qt 20 degrees celcius with a pressure of 1ATM If the johns tank volume was cut in half and the pressure increasses
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