A 5.0 mL aliquot of the coffee drink containing caffeine was diluted to 50.0 mL with de-ionised water.A sample of the diluted coffee drink was run through the HPLC column under identical conditions to those used to obtain the calibration curve.The peak area obtained for this diluted sample was 2400 arbitrary units.a) What is the purpose of creating a calibration curve? (1 mark)b) Determine the concentration of caffeine in g L-1, of the diluted sample of coffee drink. (1 mark)c) Determine the concentration of the caffeine in the original coffee drink in units of M. SHOW YOUR WORKING. (2 marks)d) Determine the mass of the caffeine, in grams, in 350 mL of the undiluted coffee drink. SHOW YOUR WORKING. (1 mark)

A sample of the diluted coffee drink was run through the HPLC column under identical conditions to those used to obtain the calibration curve.The peak area obtained for this diluted sample was 2400 arbitrary units.Description of calibration curve - (x - concentration,y - peak area) - (0.010,1000), (0.020,2000), (0.030,3000), (0.040,4000), (0.050,5000),(0.060,6000)a) What is the purpose of creating a calibration curve? (1 mark)b) Determine the concentration of caffeine in g L-1, of the diluted sample of coffee drink. (1 mark)c) Determine the concentration of the caffeine in the original coffee drink in units of M. SHOW YOUR WORKING. (2 marks)d) Determine the mass of the caffeine, in grams, in 350 mL of the undiluted coffee drink. SHOW YOUR WORKING. (1 mark)

Describe the process of creating a calibration curve in spectrophotometry (200-300 words). Address the following points: What a calibration curve is and why it is used. Steps involved in creating a calibration curve (preparing standard solutions, measuring absorbance, plotting the data). How to use a calibration curve to determine the concentration of an unknown sample. give me it with 150 words

A student prepared a cereal sample solution using a procedure similar to that in Lab 5. The original sample solution was diluted by a factor of two, and then the absorbance of the diluted sample solution was measured and recorded as (4.0x10^-1). Use the following calibration plot and the dilution factor to determine the concentration of iron, in unit of M, in the original cereal sample solution. The trendline (linear regression) as displayed on the plot is y = 11898x - 0.0112.

What statements about calibration curves are true? (tick all that apply)Group of answer choicesThey can be used to determine the concentration of an unknown sample.They allow us to relate an instrument's response to an analyte.Calibration curves are only applicable to UV-Vis spectrophotometry.The can be used to determine the identity of an unknown sample.A calibration curve can be generated using a single standard sample.A calibration curve must be prepared from several standard solutions.

Parsol 340 is one of the active ingredients they put inside sunscreen.  A calibration curve for the absorbance of Parsol 340 can be seen below.  If I measured a solution of Parsol 340 and it had an absorbance of 0.019, what must the concentration (in μM) of this Parsol 340 solution be? Answer to 1 decimal place.