concentration

Q: The copper in an aqueous sample was determined by atomic absorption flame spectrometry. First, 10.0…

A: Here we have to plot the graph based on standard addition. Given the copper concentration of the…

Q: 1. What's the slope of the calibration curve? 3.95 x 10-5 4.17x10-5 1 20484 25257 2. What's the…

A: The linear regression equation of the calibration curve is: Y = 25257X - 114.32

Q: 100 ml boiled cooled and filtered water sample takes 9.6 ml of M/50 EDTA in titration. The…

A: The hardness degree can be calculated in term of CaCO3 equivalent asDegree of Hardness=Wt. of…

Q: in a standard addition calibration method, 50.0 ml volumetric flasks were used. A 5.0 ml aliquot of…

A:

Q: You obtained the following raw data when setting up a Biuret standard curve: Absorbancy 540nm BSA…

A: A question based on tools in analytical chemistry that is to be accomplished.

Q: A solution containing 2.50 mM X (analyte) and 1.20 mM S (standard) gave peak areas of 2509 and 7132…

A: Since you have asked a multiple sub-part question, we will solve first 3 sub-parts for you. For…

Q: Ibuprofen, an acidic drug, which has a pKa of 4.62, is analyzed by chromatography on C18 column with…

A: Ibuprofen is a medication in the nonsteroidal anti-inflammatory drug class that is used for treating…

Q: A) Given the following set of data, plot the chromatogram (absorbance versus volume of eluate). Vol…

A: To plot the chromatogram, the volume of eluate is taken as x axis and absorbance as y axis The graph…

Q: A student wanted to determine the level of lead in amoxicillin powder, so he transferred 148 mg of…

A: Given the absorbance of the diluted solution, Y = 0.48  Calibration equation is: Y = 12.25X - 0.05…

Q: confirmation ▪ True or false: The purpose of the internal standard is to make quantitation of the…

A: Internal standard is added blank as well as sample to determine the concentration of analyte.

Q: What is the molar absorptivity, in M-1cm-1, for a 4.00×10-5 M solution placed in a 2.00 cm cuvette…

A:

Q: fill in the column thats empty by finding the standard deviation for each average absorbance, with…

A: Concentration of Dye  Average Absorbance of replicate   Standard division 1mg/L 0.269 0.731…

Q: Felodipine calcium channel blocker standard (0.251mg/ml) and felodipine sample (0.245mg/ml)…

A: Given that: concentration of felodipine standard = 0.251mg/ml concentration of felodipine sample =…

Q: Using Beer's law, calculate the molar absorptivity (M-1 cm-1) of PNP from the absorbance. The path…

A: The amount of substance that resides in the given volume of solvent to furnish the solution can be…

Q: The molar absorptivities of compounds X and Y were measured with pure samples of each:…

A:

Q: A student weighed out 0.150 g of protein powder and dissolved it in 100 mL of water (Solution 1).…

A:

Q: Using this table for the standard durve of cobalt (II) solution in UV Vis Molarity (M) Absorbance…

A: Given data L=10 cm we know that Beer Law is  Absorbance=ε×M×Lwhere : M=Molarity , L=Length ,…

Q: A toluene solution (1.50 mg / L) shows an absorbance of 0.30 in a cuvette with a 0.025 mm optical…

A: The given data contains, Absorbance of toluene = 0.30 Pathlength of cuvette = 0.025 mm.…

Q: absorbancy of 0.310 was obtained. Set up a standard curve, excluding outliers (experimental and…

A:

Q: density

A: According to the question, the readings are: 0.24, 0.35, 0.67, 0.89. We need to determine the…

Q: Which data point in your standard curve is the most important in determining the best straight line…

A: Hello. Since you have asked multiple questions, I shall be answering the first question only. If you…

Q: A student weighed out 0.150 g of protein powder and dissolved it in 100 mL of water (Solution 1).…

A: In the solution, the solute concentration is decreased on the mixing of the more amount of the…

Q: How resolution in HPLC analysis can be improved?

A: HPLC i.e  high-performance liquid chromatography is an analytical method which is being used to…

Q: Absorbance Volume Concentration ug/mL (mL) of each standard 1 0.000 2 1 0.005 3 2.5 0.010 4 6.25…

A: The linear regression equation Y = 0.0036x + 0.0006

Q: HPLC VFA analysis - why do I get so different peaks for very similar samples?

A: Volatile fatty acids are formed during microbial fermentation of organic matter and are present in a…

Q: Volume of dye solution added (mL) 9.80 mL Concentration of bleach solution used (M) 0.090 M Volume…

A: Given data : The concentration of the stock yellow dye in solution in Mole (Mi) is =  3.40 x 10-5 M…

Q: 5) A 0.50 g soil sample was digested with 1.0 mL of HNO3-H2O2 mixture (1:1, v/v) and then diluted to…

A: The linear equation for copper calibration plot is:   y = 0.04x + 0.0097          ________(1)

Q: In a Bradford assay, 17 pl of a protein isolate sample was diluted by adding 24 pl of water prior to…

A: Given calibration curve data:

Q: The standard curve of a biuret assay gave the equation: y=0.4193x. The absorbance for Unknown A =…

A: Biuret Protein Assay is a colorimetric technique specific to proteins and peptides. Biuret is a…

Q: 2. What type of instrumental analysis technique is used to measure the concentration of an analyte…

A:

Q: 19. What type of sample analysis usually operates on the 10-4 g scale of sample size? A. macro…

A: 19. Option D. Ultra micro analysis

Q: A water sample was analyzed for Fe content using the iron- phenanthroline analysis: Reagent Blank…

A:

Q: Čalculate the concentration of an AMD sample that has an absorbance of 0.155 an the following…

A: Without using the intercept value we can find the concentration at its respective absorbance using…

Q: A solution in part B initially contains (4.0800x10^-4) molar SCN" and (2.850x10^-3) molar Fe3+ This…

A: Given that: absorbance = 4.810×10-1  initial concentration of Fe3+ = 4.0800×10-4 M initial…

Q: How do I do question #3 about correspondence between % transmittance and absorbance? Thank you

A: The relation between absorbance (A) and Tansmittance (T) is :

Q: As solvent polarity increases, the Retention Factor (Rf) of compounds on the TLC plate increases.…

A: Retention factor= distance travelled by compound/distance travelled by solvent. As solvent polarity…

Q: 2. A spectrophotometric method for the quantitative determination of the concentration of Pb in…

A: Given:-             To find the concentration of the lead in the blood sample and its equation is:…

Q: Consider the following data set: Sample Corrected Absorbance at 470 nm 100 ug/ml CuSO. standard 200…

A: The standard calibration plot is below-

Q: The concentration of butanol 1.5M. Calculate the molar absorptivity ? when the solution produced an…

A: A numerical problem based on Beer-Lambert law, which is to be accomplished.

Q: A graphite furnace atomic absorption spectrophotometer (AAS) was used to determine the arsenic (As)…

A: Given data Concentration Absorbance 2 0.17 4 0.28 6 0.48 8 0.53 10 0.72

Q: A researcher prepared mixed solutions at different concentrations and measured the absorbances with…

A: Preparation of 1M H2SO4- Molecular wt Of H2SO4  98g/mol. For liquid solution, it's density has to be…

Q: Suppose that a solution has an absorbance of 0.250 at a wavelength of 450 nm.  If the concentration…

A:

Q: Preparing a standard curve. 1. determine the absorbance max of [FeSCN]2+               it is 448.1…

A: The number of moles of iron (III) and SCN- that used to prepare [FeSCN]2+ is determined as shown…

Q: You have a concentrated sample solution of a new wine from a winery to analyze for malic acid…

A: A common relation for the absorbance recorded is, A=εclA=Absorbanceε=Molar absorptivity…

Q: 3. Find the molar absorptivity Concentration Measured (ppm) coefficient, the R? assuming that the…

A:

Q: n an experiment on UV-Vis Spectrophotometry, What are the results for A and B? A. Calibration Curve…

A: Given: Concentration of Cu+2 solution ppm (Cu+2) Absorbance 0.01 635.46 0.0965 0.02 1270.92…

Q: Blue Blue dye stock solution 0.293 M Absorbance at 630 nm 0.00265 Calibration curve y = 0.0833x A…

A: a) The stock solution of blue dye has concentration = 0.293 M Since the volume of blue dye taken =…

Q: A standard curve for glucose analysis was prepared.The slope (m) was found to be 1.341 while the…

A: Given: Slope(m) = 1.341 y-intercept = -0.333 Absorbance (y) = 0.151

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.