Question
In: Chemistry
A surface water sample of 50 ml was taken to determine the concentration of an organic...
A surface water sample of 50 ml was taken to determine the concentration of an organic pollutant in the sample. An organic solvent was used as extracting solvent. On analysis of both phases by GC-MS, the pollutant concentration (mass/vol based) in the organic phase was 5 times that found in the aqueous phase. If after the second extraction (each using 50ml fresh organic solvent) the concentration of pollutant in the organic phase was 18 ppm (mass basis), determine the initial mass of pollutant in the water sample before any extractions were carried out. The density of solvent used is 0.65 g/ml & of water is 1.0 g/ml.
Solutions
queen_honey_blossom answered 1 year agoRelated Solutions
To determine the ammonia concentration in a sample of lake water, you mix 10.0 mL of...
To determine the ammonia concentration in a sample of lake
water, you mix 10.0 mL of lake water with 5 mL of phenol solution
and 2 mL of sodium hypochlorite solution and dilute to 25.0 mL in a
volumetric flask (sample A). To a second 10.0 mL solution of lake
water you add 5 mL of phenol, 2 mL of sodium hypochlorite, and 2.50
mL of a 5.50 × 10–4 M ammonia solution and dilute to 25.0 mL
(sample B)....
An organic acid concentration in a hard sample was determined by diluting a 15.00 mL sample...
An organic acid concentration in a hard sample was determined by
diluting a 15.00 mL sample of 200.00 mL solution. A 20.00 mL
portion of the diluted sample reacted with 40.0 mL of 0.05417 M
NaOH completed. The excess OH- was back titrated with 5.21 mL of
0.02154 M HCL. The concentration of the organic acid in the orginal
sample is:
Answer is 1.370 M
A 50 mL sample of water has an initial pH of 11.2. Determine the total alkalinity...
A 50 mL sample of water has an initial pH of 11.2. Determine the
total alkalinity and the different species of alkalinity if the
equivalence point is reached at 8 mL of 0.01 N
H2SO4 and 4.5 equivalence point is reached at
18 mL of 0.01 N H2SO4. (10 points
Determine the concentration of H2SO4 when 10 mL of the surround water was collected near the...
Determine the concentration of H2SO4 when
10 mL of the surround water was collected near the C & H Sugar
Company. Your sample was titrated with 5 ml of 0.5 Molar NaOH
solution to neutral the pH. Determine the concentration of
H2SO4 in your water sample.
A 236.4 mL sample of water contains 0.0294 g of NaCl. Calculate the concentration in ppm....
A 236.4 mL sample of water contains 0.0294 g of NaCl. Calculate
the concentration in ppm.
concentration = ___ ppm
A student wishes to determine the chloride ion concentration in a water sample at 25 °C...
A student wishes to determine the chloride ion concentration in
a water sample at 25 °C using a galvanic cell constructed with a
graphite electrode and a half-cell of AgCl(s) + e⁻ → Ag(s) +
Cl⁻(aq) E°red = 0.2223 V And a copper electrode with 0.500 M Cu²⁺
as the second half cell Cu²⁺(aq) + 2 e⁻ → Cu(s) E°red= 0.337 V The
measured cell potential when the water sample was placed into the
silver side of the cell was...
Suppose the mole number of Ca2+ ions in a 50 mL water sample is quantified as...
Suppose the mole number of Ca2+ ions in a 50 mL water sample is
quantified as 1.5 × 10−5 mol. What is the concentration of Ca2+
ions in the water sample in ppm CaCO3?
Determine the calcium content (in ppm) of a 100.00 mL sample of drinking water if the...
Determine the calcium content (in ppm) of a 100.00 mL sample of
drinking water if the following data were obtained. Titrant is
0.0505 M EDTA, 13.49 mL were used when an aliquot of the sample was
at pH 13.0, 16.99 mL were used for an aliquot at pH 10.5.
Determine the calcium content (in ppm) of a 100.00 mL sample of drinking water if the...
Determine the calcium content (in ppm) of a
100.00 mL sample of drinking water if the following data were
obtained. Titrant is 0.0421 M EDTA, 13.84 mL were used when an
aliquot of the sample was at pH 13.0, 19.36 mL were used for an
aliquot at pH 10.5.
What are the theoretical oxygen demand and organic carbon concentration of a water that contains the...
What are the theoretical oxygen demand and organic carbon
concentration of a water that contains the following
components:
Glucose (C6H12O6): 150 mg/L
Benzene (C6H6):15 mg/L
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- UNIX ONLY -- DIFFICULT LAB ASSIGNMENT This is an extremely difficult subject for me. Could you...
- Do you know why your credit card can be refused even though you are profitable?
- The Following Java expression: S/10 * 10 + 10 – S = C Show that this...
- Year Cash Flow 0 −$9,700 1 5,800 2 2,500 3 3,400 &nb
- In a two – story building, an exterior column is to be designed for a service...
- Explain the use of neural networking modeling in predictive analytics. Discuss a real-life example of where...
- Boarder line and antisocial disorder are perhaps the most research personality disorder.What are the most common...
ADVERTISEMENT