Question
In: Statistics and Probability
Three samples of drain cleaner were dissolved in deionized water. Three determinations of the wt-% alkali...
Three samples of drain cleaner were dissolved in deionized
water. Three determinations of the wt-% alkali in each sample were
made. The following information was obtained:
Mean for Sample #1 = 53.56 wt-% alkali
Mean for Sample #2 = 60.32 wt-% alkali
Mean for Sample #3 = 59.48 wt-% alkali
Fisher's Least Significant Difference (LSD) was computed (at
95% confidence) and found to be LSD = 0.88 wt-% alkali. Compute the
numerical differences between all three unique pairs of means and
indicate whether each difference appears to be real or is only a
result of variability in the experiment.
Solutions
orchestra answered 2 years agoRelated Solutions
6. Sodium carbonate (1.3579 g) was dissolved in deionized water to give a solution with a...
6. Sodium carbonate (1.3579 g) was dissolved in
deionized water to give a solution with a total volume of 250.0 mL.
What was the pH of the resulting solution? Hint: For
carbonic acid,
pKa1 = 6.351 and pKa2 = 10.329.
Sodium carbonate (2.4134 g) is dissolved in enough deionized water to give a solution with a...
Sodium carbonate (2.4134 g) is dissolved in enough deionized
water to give a solution with a total volume of 250.0 mL. What is
the pH of the resulting solution? Hint: For carbonic acid,
pKa1 = 6.351 and pKa2 =
10.329. What is the equilibrium concentration of
H2CO3 in the solution? calculate the value of
alpha HCO3-
Sodium carbonate (2.4134 g) is dissolved in enough deionized water to give a solution with a...
Sodium carbonate (2.4134 g) is dissolved in enough deionized
water to give a solution with a total volume of 250.0 mL. What is
the pH of the resulting solution? Hint: For carbonic acid, pKa1 =
6.351 and pKa2 = 10.329. What is the equilibrium concentration of
H2CO3 in the solution? calculate the value of alpha HCO3-
Sodium carbonate (1.3579 g) was dissolved in deionized water to give a solution with a total...
Sodium carbonate (1.3579 g) was dissolved in deionized water to
give a solution with a total volume of 100.0 mL. What was the pH of
the resulting solution?
1.0 gram samples of solutes A,B, and C are dissolved in 10.00 g of water to...
1.0 gram samples of solutes A,B, and C are dissolved in 10.00 g
of water to give three separate solutions. Use the information
below to calculate the molecular mass of A, B, and C. Determine the
molecular formula of solution B. Assume all solutes are nonvolatile
and nonelectrolytes. 1. Solute A has a vapor pressure of 16.9 torr
at 20 degrees C. The Vapor pressure of water at 20 degrees C si
17.5 torr. Calculate Molecular mass. 2. Solute B...
You are asked to determine the concentration of ions dissolved in water samples collected from a...
You are asked to determine the concentration of ions dissolved
in water samples collected from a storm sewer. The client is only
interested in the following anions: Cl–, Br–, NO3–, SO42– and the
following cations: NH4+, Na+, K+, Ca2+ and Mg2+. Select the best
method of analysis.
Options: Gas Chromatography
HPLC-Liquid Chromatography
Atomic Absorption
HPLC-Ion Chromatography
Atomic Emission
UV/Vis Spectrophotometry
You are asked to determine the concentration of ions dissolved in water samples collected from a...
You are asked to determine the concentration of ions dissolved
in water samples collected from a storm sewer. The client is only
interested in the following anions: Cl–, Br–, NO3–, SO42– and the
following cations: NH4+, Na+, K+, Ca2+ and Mg2+. For the scenario
above, identify the best detection method for the analysis:
Question options:
FID
ECD
Refractive Index
UV Conductivity
TCD
1. Samples of drinking water were analyzed for lead contamination. Analysis of the drinking water showed...
1. Samples of drinking water were analyzed for lead
contamination. Analysis of the drinking water showed a lead
concentration of 12.54 ppb. Analysis of a sample of the same
drinking water spiked with 20.00 ppb lead gave a concentration of
29.63 ppb. Calculate the spike recovery. Is the method sufficiently
accurate?
2. A chemical technician wants to verify the precision of an
analytical procedure used to determine citric acid concentration in
orange juice. She obtains 10.00 mL of a particular...
1.Water samples were taken from water used for cooling as it was being discharged from a...
1.Water samples were taken from water used for cooling as it was
being discharged from a power plant into a river. It has been
determined that as long as the mean temperature of the discharged
water is at most 150 F, there will be no negative impact on the
river's ecosystem. To investigate whether a plant is in compliance
with regulations that prohibit a mean discharge water temperature
above 150 F, researchers took 50 water samples at randomly selected
times...
a) two 10.0 Ml water samples were taking The procedure in this experiment is followed to...
a) two 10.0 Ml water samples were taking The procedure in this
experiment is followed to determine the phosphate concentration.
What would be the average phosphate concentration in the solution
be( in units of molarity) if the student obtained 0.5133g and
0.5275g of struvite using gravimetric analysis? show all work
assume this procedure precipitates out all of the phosphate from
the sample in form of struvite. b) what would be the concentration
of the phosphate ion (Po4^3-) in the water...
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