Q: If 1.000 L of 0.2000 M NaOH was
If 1.000 L of 0.2000 M NaOH was unprotected from the air after standardization and absorbed 14.2 mmol of CO2 , what is its new molar concentration when it is standardized against a standard solution o...
See AnswerQ: The method of standard additions was used to determine nitrite in a
The method of standard additions was used to determine nitrite in a soil sample. A 1.00-mL portion of the sample was mixed with 24.00 mL of a colorimetric reagent, and the nitrite was converted to a c...
See AnswerQ: A standard solution of 2I increased in concentration with standing. Write
A standard solution of 2I increased in concentration with standing. Write a balanced net ionic equation that accounts for the increase.
See AnswerQ: a. A 0.1527-g sample of primary-
a. A 0.1527-g sample of primary-standard AgNO3 was dissolved in 502.3 g of distilled water. Calculate the weight molar concentration of Ag1 in this solution. b. The standard solution described in par...
See AnswerQ: A standard solution was put through appropriate dilutions to give the concentrations
A standard solution was put through appropriate dilutions to give the concentrations of iron shown in the accompanying table. The iron(II)-1,10,phenanthroline complex was then formed in 25.0-mL aliquo...
See AnswerQ: Palladium(II) forms an intensely colored complex at pH 3
Palladium(II) forms an intensely colored complex at pH 3.5 with arsenazo III at 660 nm.20 A meteorite was pulverized in a ball mill, and the resulting powder was digested with various strong mineral a...
See AnswerQ: Mercury(II) forms a 1:1 complex with triphenyltetrazolium
Mercury(II) forms a 1:1 complex with triphenyltetrazolium chloride (TTC) that exhibits an absorption maximum at 255 nm.21 The mercury(II) in a soil sample was extracted into an organic solvent contain...
See AnswerQ: The volumes of a 1.10 ppm standard solution of Zn2
The volumes of a 1.10 ppm standard solution of Zn2+ shown in the following table were pipetted into separatory funnels each containing 5.00 mL of an unknown zinc solution. Each was extracted with thre...
See AnswerQ: An unknown cadmium (II) solution was analysed polarographically by the
An unknown cadmium (II) solution was analysed polarographically by the method of standard additions. A 25.00-mL sample of the unknown solution produced a diffusion current of 1.86 μA. Following additi...
See AnswerQ: Keaston-Trenton Service (KTS) was a domestic heating boiler
Keaston-Trenton Service (KTS) was a domestic heating boiler maintenance company, based in the East of England. Founded in the 1960s by plumber Christopher Trenton, it had grown substantially and was n...
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