Q: What factors could have contributed to your experimental value being different from the actual…
A: common sours of errors include instruments error, air resistance ,human error , lab experimental…
Q: The pharmacist attempts to weigh 120 mg of codeine sulfate on a balance with a sensitivity…
A: Maximum weight of codeine sulfate (required) =(120+6)mg=126mg
Q: Determination of AHf of NH4CI(s) & AH soln AHf of NH4CI(s) using your values of AH neut AHf of…
A: Please note that dissolution is an endothermic process. So, ∆Hsol should be 8.68 kJ/mol ( a positive…
Q: What is sampling in analytical chemistry?
A: Analytical chemistry is a branch of chemistry in which we analyze the sample by different…
Q: Mass Spectrum 100 - 80 - 60- 40 20- 10 20 30 50 60 70 m/z Relative Intensity
A: Note : Propyl acetate will give m/z = 43 corresponds to acetyl cation.
Q: TWO procedures that can cause the result to have poor accuracy or precision in the experiment.
A: The two main procedure by which one will get wrong result and poor accuracy. One of them is…
Q: For the numbers 116.0, 97.9, 114.2, 106.8 and 108.3, find the range and 90% confidence interval for…
A:
Q: All of the following increase the width of a confidence interval BUT? Increased variability…
A: A multiple choice question based on general chemistry, which is to be accomplished.
Q: Using the Q test, decide whether the value 222 should be rejected from the set of results: 193, 222,…
A: Dixon's Q test or Q test, is used for identification and rejection of outliers from the given…
Q: Match the correct choices with the given. For gravimetric analysis, use this data to answer the…
A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…
Q: After performing Part A of the experiment, a student obtained the following concentrations for…
A: Given that, in an experiment the obtained concentration of the NaOH Trial 1 Trial 2 Trial 3…
Q: Explain how detectors work in MS.
A: The role of detector is very crucial in mass spectrometry as it uses incident ion and help in…
Q: What do you call the type of analytical method that relies on the absolute stoichiometric…
A: There are several analytical methods are used to determine the concentration of analytes .
Q: One method for quantitative determination of the concentration of constituents in a sample analyzed…
A:
Q: Effect of this error in chromatographic work: Too much sample is applied to the paper.
A: Answer - chromatography - Chromatography is a laboratory technique for the separation of a mixture.…
Q: For EACH type of gravimetric analysis: Give actual applications of each analysis. Include the…
A: Gravimetric analysis: It is a quantitative analytical method that is based upon the measurement of…
Q: What is the average ratio in this chart?
A: Epsom salt is a hydrated salt of magnesium sulfate. It is used for relieving muscle pain and is used…
Q: Other things being equal, the margin of error of a confidence interval increases as A the confidence…
A: The margin of error, also known as the confidence interval, indicates how closely your survey…
Q: Data Sheet with Sample Results Note: results that require calculations are purposely left blank and…
A: Solution Mass of NaCl dissolved = (mass of beaker+stirring bar+NaCl)-(mass of beaker+stirring bar) =…
Q: . Describe volumetric quantitative analytical methods.
A: In chemistry, there are many ways to check the deviation of experimental data from the accurate…
Q: Can paper chromatography be used to separate and identify very volatile substances? Why? Please…
A: TLC means “Thin Layer Chromatography”. This experiment is done on Wattman paper. If the molecule has…
Q: What kind of systematic errors are detected by varying the sample size?
A: The kind of systematic errors are detected by varying the sample size has to be given,
Q: Determine the weight percent (wt%) of selenium in the soil sample and find the absolute uncertainty…
A: Given: To Calculate: weight percent Se in the soil and the absolute uncertainty in the weight…
Q: What is the correct ratio of sample to KBr? O 1) 1:10 ratio O 2) 1:50 ratio 3) 1:2 ratin
A: Spectroscopy plays an important role in the analysis of chemical compounds. Infrared spectroscopy is…
Q: 7. What experimental factors are assumed to be constant in this experiment?
A: (7) Consider the ideal gas equation is as follows; PV = nRT…
Q: a) By how much should the student expect their sample measurements to increase by? Why? b) Will…
A: (a) In spectrophotometry, the absorbance is directly proportional to the concentration of analyte…
Q: Calculate the 95% confidence interval for these set of data: 3.3,3.4,3.1 and 3.6 ppm
A:
Q: What is the meaning of a confidence interval?
A: In chemistry there are many ways to check the deviation of experimental data from the accurate…
Q: The least squares calibration methods depend on? O A. Components of sample O B. Analyte…
A: The least-squares calibration methods depend on analyte identification.
Q: In analytical chemistry, when and why do we do representative sampling?
A: Representative sample is defined as the small portion of the overall sample to determine the…
Q: Distribution Coefficient - Please help write conclusions based on results provided. Thank You!
A: The mass of acid in ethyl acetate after single extraction = 0.1072 g And, the mass of acid in ethyl…
Q: All of the following are classified as an instrumental method of analysis EXCEPT: A.…
A: The analysis in which we rely on the instrument is called as instrumental method of analysis.
Q: a) The total hardness of this sample b) The percentage error in this sample
A: Topic-- Hardness of water Hardness of water-- The simple definition of water hardness is the amount…
Q: explain why data analysis is important to validate results
A: When we perform an experiment in chemistry. We obtain practical data carried out in order to find…
Q: Peak area proportional to mass or concentration of the individual components of the sample injected.…
A:
Q: What is the relative error in the ppt of the following data if the accepted value is 70.05 M? 70.24…
A:
Q: Peak area proportional to mass or concentration of the individual components of the sample injected.…
A: The area under the peak is a function of that compound's concentration in the sample.
Q: Is the precision of your two trials within 5 %? This means is your % average deviation <5 %. Support…
A: Given that
Q: The last value of each dataset in the table may be a questionable value. Apply the Q test with a 95%…
A:
Q: based on the data from the experiment, how do i calculate the percentage of error? also, how do i…
A:
Q: 3. Calculate the average deviation of the densities and comment on the precision of the…
A: The question is based on the concept of analytical chemistry. we have to calculate average deviation…
Q: If the selectivity factor is equal to 1, the peaks are separated. True or False?
A: The given statement is If the selectivity factor is equal to 1, the peaks are separated.
Q: please find the percent error not for each one but for the three trials together:)
A: In the given question we have to calculate the percent error for the density of water. we know…
Q: In the first part A of the procedure, the ratio of moles H2O/moles CaSO4 is found to be 1.93. In the…
A: Relative deviation The consistency of a reading can be indicated by its relative deviation. The…
Q: This part of the analytical process is usually the most difficult step and the source of the…
A: 1) Choosing a Method The choice is sometimes difficult and requires experience as well as…
Q: 2. Assuming that all groups carried out the experiment and associated calculations correctly, which…
A: Enthalpy of fusion is defined as the amount of energy required to change the state of matter from…
Q: What will happen to the sample size if the percentage error becomes lower e.g. 5% instead of 10%?…
A: A question based on tools in analytical chemistry that is to be accomplished.
Q: When measuring iron in river water by spectrophotometry using the ferrozine reaction that is…
A: A question based on analytical process that is to be accomplished.
Q: Density of solution: Trial 1: 1.2 g/mL Trial 2: 1.2 g/mL Trial 3: 1.2 g/mL Average density = 1.2…
A:
What impact would using a much smaller sample have on the accuracy of your results
Step by step
Solved in 2 steps
- What is the meaning of a confidence interval?7. From the normal curve of error, find the probability that a result is outside the limits of ±2σ from the mean. What is the probability that a result has a more negative deviation from the mean than -2σ?What is a 99% confidence interval uncertainty of the slope when we are given a trendline with a slope of 42.211 and an R² value of 0.9991 for a set of 145 data points?
- Please confirm if my answer is correct or not. Due to the need for this to be correct I would like you to provide me with a confidence score in you answer on a scale from 1 to 10 how confident are you in your answer. Please be sure to double check your answerThe answer I got was 0.6 and I wanted to make sure it was correctThe concentrations of K* in water were measured with atomic absorption spectroscopy (AAS) and atomic emission spectroscopy (AES). Four water samples obtained at different cities were used, and each sample was measured one time. The measurements are shown in the table below: Tulare Clovis 8.9 ppm 6.7 ppm 7.0 ppm 5.0 ppm What is the calculated t-value (tcalculated) for the statistical comparison of these two methods? AAS AES 1.908 2.664 2.309 2.938 3.012 Fresno 5.5 ppm 5.4 ppm Selma 12.5 ppm 9.8 ppm
- What are the advantages and disadvantages of volumetric and gravimetric analysis?I am slightly confused on how to do this. I think I figured it out but I just want to compare data and take notes on what I have done incorrectly.Other things being equal, the margin of error of a confidence interval increases as A the confidence level decreases. B the population standard deviation increases. The sample mean increases. D the sample size increases.
- Please just answer this question, I answered the others already Calculate the standard error of regression (SER) for the Lineweaver–Burk slope and the Eadie–Hofstee slope to compare the precision of each. Eadie–Hofstee SER: it is not 0.128, 0.028, 0.136, or 0.1362 or 0.013.explain why data analysis is important to validate resultsCalculate the mean and 90% confidence interval for the data set. Sample Value 1 8.0626 8.0650 3 8.0583 4 8.0564 8.0571 6. 8.0600 mean: étv A A hulu 2. 5.