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We performed an experiment in lab on pH titration. We titrated a 0.1033 M NaOH solution into an unknown concentration of a weak acid (25.00 mL). It also says the unknown acid will have a concentration of about 0.1 M. I already found the Equivalence point to be 23.5, the pKa to be 4.25 and the Ka to be 5.62 x 10^-5. I just need to figure out the unknown concentration of the weak acid.
An ethylene glycol solution contains 21.2 g of ethylene glycol in 85.4 ml of water. Compute the freezing point and boiling point of the solution. (Assume a density of 1.00 g/mL for water)
A 520.0 mL of a buffer solution that is 0.175 M in HC2H3O2 and 0.165 M in NaC2H3O2, Calculate the inital pH and the final pH after adding 0.020 mol of HCl
An attempt at synthesizing a certain optically active compound resulted in a mixture of its enantiomers. The mixture had an observed specific rotation of 12.4°.
When calculating the density of your regularly shaped object, which measurement will limit your final result?
The pH of a bicarbonate-carbonic acid buffer is 6.95. Calculate the ratio of the concentration of carbonic acid (H2CO3) to that of the bicarbonate ion (HCO3-)
heated from 20 to 50 degrees Celsius. How many calories were needed to bring about the temperature change?
Analytical molar concentrations of HA species 2) Equilibrium molar concentrations of HA species. Trichloroacetic acid (HA) is 73% ionized in water
At 20 degrees celsius the vapor pressure of ethanol is 45 torr and the vapor pressure of methanol is 92 torr. what is the vapor pressure at 20 degrees celsius of a solution prepared by mixin 26.0 g. of methanol and 85 g. of ethanol?
The formal charge on the P atom is zero and It is best described with three resonance structures.
a 25.00mL sample of NaClO is titrated with 0.001005M HNO3. If 10.02mL of of HNO3 is required to reach the endpoint of titration, determine the concentration of ClO- in the original sample.
electorde to one side of the cell and the standard hydrogen electorde to the other side of the cell. If the temperature of this cell is 10.25 degree C , what is the electrochemical potential of this cell? E Ni2+/Ni= -0.230V
The combustion of heptane with oxygen is a well known process. Write a balanced equation for the reaction of heptane, C7H16, with oxygen, O2, forming the products carbon dioxide, CO2, and water, H2O. What mass of water will be produced by the comp..
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