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You are performing the titration of a buffer with a pKa of 6.4. You start at the pKa, and after adding 3mL of 1M HCl your buffer reaches pH 5.4. How many more mL of HCl should you need to go to pH 4.4? (3mL, more than 3mL, or less than 3mL?) Clearly explain your answer.
In the bromination of ethane (C2H6) reaction, one wants to produce 10.0 g of C2H5Br product. How many grams of C2H6 would be needed to react with excess Br2.
What is the percent by mass of aluminum chloride (AlCl3) prepared by dissolving 26.8g in 355.0ml of water? assume density of water is 1.00g/ml
if it took 18.72 (+ and - 0.05) ml of the base to reach the equivalence point. what was the concentration of unknown acid? 2) what is the uncertainity associated with this determination?
The term solution is synonymous with which of the following. A. compound B. element C. homogeneous mixture D. heterogeneous mixture
Calculate the total amount of caffeine that can be extracted into three portions of methylene chloride. Caffeine has a distribution coefficient of 4.6, between methylene chloride and water.
a small bubble rises from the bottom of a lake where the temperature and pressure are 4oc and 3.0 atm to the waters
what is the difference in a molecule and an
write the molecular formula for given compounds and determine the amount of molecules present.for each of the following
Liquids cannot be compressed easily. What does this imply about the amount of space that must be present between the individual liquid particles?
For the molecule CH3COOCH3, indicate the orbitals involved in the bonding of the carbon and oxygens. Draw a picture to show how the orbitals overlap in both cases.
HEPES are synthetic amine compounds that are often used to make buffers for biochemical studies. What is the pH of a 1.0 L buffer solution that is 0.250M HEPES
What mass of limestone (in kg) would be required to completely neutralize a 15.3 billion-liter lake that is 1.9×10^-5 M in H2SO4 and 8.9×10^-6 M in HNO3
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