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In a titration of HNO3, you add a few drops of phenolphthalein indicator to 50.00 mL of acid in a flask. You quickly add 20.75 mL of 0.0502 M NaOH but overshoot the end point, and the solution turns deep pink. Instead of starting over, you add 31.25 mL of the acid, and the solution turns colorless. Then, it takes 3.38 mL of the NaOH to reach the end point. (a) What is the concentration of the HNO3 solution? (b) How many moles of NaOH were in excess after the first addition?
A modern chealting agent used for this purpose is succimer (C4H6O4S2). Suppose you are trying to determine the appropriate dose for succimer treatment of lead poisoning.
Calculate the change in enthalpy and entropy of 50 g of liquid water starting at 10 degrees Celsius and completely evaporating into H2O gas at 100 C.
A 4.10 g nugget of pure gold absorbed 292 J of heat. The initial temperature was 28.0°C. What was the final temperature.
Determine the final concentration if A 129 mL portion of that solution is diluted using water of 149 mL.
What is the smallest amount of CuO (in moles) that would establish the equilibrium?
calculate the approximate volume of a 0.600 mol sample of gas at 15.0 degrees Celcius and a pressure of 1.10 atm.
What volume of Cl2 gas, measured at 682 torr and 40 degrees celcius, is required to form 26 g of NaCl ?
If the volume of ocean water is 5.4*10^20 contains 4.1 percent sodium chloride ("salt") by mass and the density of the water is 1.86 g/mL.
Mass of Carbonates Needed to Raise Solution pH One Unit, An actual lab titration of a mildly acidic process water at a pH of 4.0 requires 0.9 grams/liter of Na2CO3 to raise the pH from 4.0 to 5.0; re-running the titration but this time using CaCO3..
In the electrolysis of aqueous NaCl, how many liters of Cl2(g) (at STP) are generated by a current of 7.50 A for a period of 100. min.
What factor determines whether a carbon atom in a compound is chiral? Draw the Lewis structure for each of the following functional groups: alcohol, ether, aldehyde, ketone, carboxylic acid, ester, amine.
The liquid rate used is twice the minimum, the equilibrium relationship can be represented as yA=9.95 xA then determine what is HOG, operating line relationship, NOG and packed height of the column?
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