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Question- You are presented with an unknown weak acid. You measure the pH of the solution to be 3.09 after dilution with water as per the lab instructions (remember the total volume is 20 mL after dilution). He titrates the weak acid with 14.26 mL of a 1.26 M solution of NaOH. Calculate the initial [HA] and Ka of the weak acid.
Explain each and every step in detail. I need proficient help in the above problems.
A mixture of CO(g) and O2 (g) in a 1 L container at 1000 K has a total pressure of 2.2 atm. After some time the total pressure falls to 1.9 atm as the result of the formation of the CO2(g). Find the mass in grams of the CO2 gas.
An environmental engineer analyzes a sample of air contaminated with sulfur dioxide. To a 500m mL sample of air at 700 torr and 38 degrees celsius, she adds 20.00 mL of 0.01017 M aqueous iodine, which reacts as follows
If the freezing point depression of water is -1.86 degrees C/M, what would be the freezing point of this solution
Problem- Write a line-angle formula of each constitutional isomer of dimethylcyclohexane. Write the IUPAC name of each isomer.
the solubility of lead (ii) iodide (PbI2) is 0.64 g/L at 20 C. What is the solubility product for lead (II) iodide? Show work please
benzene ring with a 2 carbonyl joined by an O in the middle and a iso propal group is on the other carbonyl. (would be a symmetric anhydride if it weren't for the benzene and isop-ropral substituents on the two carbonyls)
Draw Lewis dot structure and predict molecular geometry - Show the Lewis structures of the following molecules and then predict their geometry.
On the obtained mass-spectra you got in the expected parent-ion mass region two adjacent lines with almost the same abundance (m/z=258 -100%, and m/z=260 -97%). Fragments do not show any adjacent abundant lines. What conclusion can you derive from..
Give the general Henderson-Hasselbalch equation and sketch the plot it describes (pH against amount of NaOH added to a weak acid). On your curve label the pKa for the weak acid, and indicate the region in which the buffering capacity of the system..
An aqueous solution has a density of 0.80g/mL and is 51.0% C2H6O by mass. Determine the molar concentration of C2H6O.
The boiling point of pure ethanol is 78 degres celsius .At the first sign of condensing vapors(when maybe just one drop of distillate has been collected) do you think you have pure ethanol?why or why not
Question- Blood plasma is the solution remaining after cells (red, white, etc...) are removed from whole blood. The clinical analysis of free calcium in plasma can be down with a calcium liquid membrance ion-selective electrode.
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