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What will the pH of the equivalence point be when 10.00 mL of .0200M Carbonic acid is fully titrated to the 2nd end point using .05 M NaOH? The two pKa's for the carbonic acid are pKa1= 6.000 and pKa2=10.500.
What will be the molarity of a compound (1 litre) with a molecular weight of 169 and purity as 41%.
A gas sample containing 1.35 mol at 25°C exerts a pressure of 405 torr. Some gas is added to the same container, and the temperature is increased to 50.°C. If the pressure increases to 800. torr, how many moles of gas were added to the container?
A balloon vendor at a street fair is using a tank of helium to fill her balloons. The tank has a volume of 102 L and a pressure of 131 atm at 23 celsius
A 100 ppm quininesulfate ( MW = 782.97 g/mol) solution was used as the standard. Assuming that your original (undiluted) sample contained 142 ppm of quinine sulfate, calculate the amount in ppm of quinine in the sample.
Which reagent is used in excess? How great is the molar excess (how many times greater)? I'll add the procedure images in the comments
A flask contains 0.110 mol of liquid bromine, rm Br_2. Determine the number of bromine molecules present in the flask.
The pH of the solution at the equivalence point, The pH of the solution after 40.0 mL of HCl are added.
Calculate the pH of a solution resulting from the addition of 10.0 mL of 0.10 M NaOH to 50.0 mL of 0.10 M benzoic acid (Ka = 6.5 x 10-5)
calculate the number of excess reagent units remaining when 188 PbS formula units and 279 O2 molecules react?
a sample of helium gas initially at 37 degrees celsius, 785 torr and 2.00L was heated to 58.0 degrees celcius while the volume expanded to 3.24L. What is the final pressure in atm.
Calculate the concentration of Hg2+, HgCl+, and HgCl2 that result when 1.00 L of a 0.100M Hg(NO3)2 solution is mixed with an equal volume of 0.100M HgCl2 solution.
He was surprised that most of the white solid melted sharply between 121 and 122 C but that a small amount remained unmelted even at temperatures above 200 C. Explain this behavior.
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