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I did an experiment in the lab called Potentiometric Determination of Fluoride. There is a series of questions that i need help to answer:
1) Explain the effect it would have if no constant ionic strength is maintained when performing potentiometric measurements.
2) A standard solution of NaF 1.00x10-3 M read -0.230V. The solution of an unknown read -0.300V. What is the [F-] in the unknown solution?
3) What is the change in the measurement of the potential if a solution of 1.00x10-3 M NaF is exchanged for another solution of 1.00x10-4 M NaF?
from the plots of the boiling point versus the volume of distillate in either of the fractional distillations of the ethanol-water mixture,what conclusion can you draw about the homogeneity of the distillate?
Naproxen belongs to a class of pahrmaceuticals, the (S)-(+)-enantiomer is the desired pharmacological activity while the (R)-(-) -enantiomer is potentially a liver toxin. Due to this, commercial Naproxen is sold as the S-(+)-enantimoer with high l..
An electrochemical cell is constructed with a zinc metal anode in contact with a 0.0520M solution of zinc(II) nitrate and a silver cathode in contact with a 0.00420M solution of silver(I) nitrate
Calculate the number of grams of KClO3 needed to make 400 mL of 0.913 M solution.
A beaker with 160 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 6.40 mL of a 0.400 it M HCl solution to the beaker. How much will the..
A helium balloon at a high altitude has 2.1 × 104 L of helium at 0.40 atm and -13°C. If the balloon descends to an altitude in which the atmospheric pressure is 1.00 atm and the temperature is 20°C.
When solutions containing silver and chloride ions are mixed, silver chloride precipitates: Ag+ (aq) plus Cl- (aq) ---> AgCl(s)
this solution was added 1.960 grams of KI and 50.00 mL of a 0.00923 M KIO3 solution. The excess I3- was titrated with 50.00 mL of a 0.02000 M Na2S2O3 solution. What was the mass percent of arsenic trichloride in the original sample?
A compound contains 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen (by mass). calculate empirical formula.
differentiate acids from compounds that contains hydrogen and an anion, or oxyanions and are not acids
The wastewater solution from a factory containing high levels of salts needs to be diluted before it can be released into the environment. Therefore, two containers of waste solution are separated by a semipermeable membrane and pressure is applie..
An iron ore sample is a mixture of Fe2O3 and several impurities. A 752. g sample of the impure iron ore is heated with excess carbon.
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