titration-of-vinegar-lab-report

Data Collection Kinetic Data Collection Time, t (s) Volume of added base (mL) First addition 40 0.50 Second addition 101 1.00 Third addition 160 1.52 Fourth addition 224 1.99 Fifth addition 278 2.49 Sixth addition 334 3.01 Seventh additlon 389 3.48 Calculations Concentration of NaOH stock solution: 0.01 M Concentration of t-BuCl stock solution: 0.2 M Volume of t-BuCl solution: 10 mL stock stock solution added to 25 mL acetone Table view List view Kinetic Data Volume of Moles of Amount of t-Bucl (mol) [-Buc] In[-BuC Time, t (s) added base added base (mL) (mol) First addition 40 0.50 Second additlon 101 1.00 Third addition 160 1.52 Fourth addition 224 1.99 Flfth additlon 278 2.49 Sixth additlon 334 3.01 Seventh addition 389 3.48 Use the data in the table above to plot In[t-BuC]]; vs time (s). Include labelled axis, a title, and a linear trendline. Upload your plot here.

How do I calculate this?

30

0.200 M 0.00200 M Test Tube No. [FESCN2*1std (M) Absorbance Fe(NO3)3 (mL) KSCN (mL) 17.98 1.97 0.815 5 (Standard) Edit Edit Edit NG 1 Info

Trial 1: Initial pH= 3.92mL Mass of KHP and Paper= 0.868g Mass of paper= 0.357g Mass of KHP= 0.511g Trial 2: Initial pH= 4.09ml Mass of KHP and Paper= 0.870g Mass of paper= 0.359g Mass of KHP= 0.511g 1)Use Kb, the number of moles of C8H4O4^2- at the equivalence point, and the total volume at that point to calculate the pH for each sample at the equivalence point. Compare these calculated results with the experimental results.

Calculate the volume of NaOH used in each trial. Use sig figs.

I need help please!!

Amax for Red 40 Solution number 1 2 3 4 Concentration 5x105m 2.5x105m Concentration of Red 40 in Gatorade Based on calibration curve, extinction coefficient for Red 40 Absorbance of Red 40 in Gatorade at max Absorbance at max 1.2939.0 .637 5020am 1.25x105m.347 500.0mm 6.25x10m 190 soonm So0nm 2.443

Table 1. pH of water samples Sample No. Water Samples pH 1 Tap water from household 6.59 2 Water from creek 7.35 3 Water from river 7.35 4 Unknown sample 7.00 Table 2. Absorbance of Samples Table 3. Calibration Curve Data* Sample No. Absorbance Absorbance 3- Concentration of PO4 Ions, ppm (1 pt each) 1 1.33 1.0 0.050 2 3.26 2.0 0.093 0.89 3.0 0.137 4 0.099 4.0 0.185 5.0 0.230 *Provided by the instructor II. Graph Determination of Phosphate Concentration 3- 1. Using Excel, plot the concentration of PO4* (x-axis) vs. absorbance (refer to Table 3) The olot must show the equation of the best-fit (or trend) line of the graph. Attach the graph below

Table 1. Data on EDTA Standardization Weight of CaCO3 (g): 0.2003g Trial Volume of EDTA (mL) Molarity of EDTA (M) 1 8.60 2 8.50 8.55 Average Molarity of EDTA (M)

Hi, can you check my math? Can percent error be negative, if so what does that mean and how do I explain that for my results?  These are calculations for Determining the ksp of Calcium Hydroxide Lab.  Thanks!

20,18,2,4,15,15,10 Using these data, construct a 80% confidence interval for the average net change in a student's score after completing the course. Assume the population is approximately normal.  Construct the 80% confidence interval. Round your answer to one decimal place.

The protein content of the unknown samples were determined using BSA as standard. The absorbance values of the standard solutions and samples are as follows. BSA concentration (mg/mL) Absorbance 0.000 20 0.110 40 0.192 60 0.248 80 0.325 100 0.400 120 0.460 a. What is the equation of the line? b. Determine the protein concentration of samples in ug/mL. Sample dilutions 1 in 14 A540 0.150 1 in 5 1 in 8 0.380 0.235

find the true concentration of Fe²+ of the original sample. A) 5.12 ppm B) 2.56 ppm C) 5.05 ppm D) 2.52 ppm

urses/ 2951 2. A linear standard curve of KMnO4 is prepared from a set of standard solutions by plotting absorbance (y) vs. concentration (x). Use Logger Pro (as described in the Data Analysis for this experiment), or Google Sheets/Excel, to plot this standard curve using the data in Table 1. Help with spreadsheets [PDF] Table 1: Data for the standard curve of KMnO4 Absorbance Concentration (M) 0.372 6.00 x 10-4 0.298 0.223 0.149 0.0744 After plotting the standard curve, enter its slope below (not the equation of the line). Report your answer to 3 significant figures. If your answer ends in one or more zeros, use scientific notation. Slope = 4.80 x 10-4 3.60 x 10-4 2.40 x 10-4 1.20 x 10-4 M-1 M 3. Suppose that an unknown sample is analyzed spectrophotometrically at the same wavelength that was used for the standard curve and the absorbance was found to be 0.186. Use the standard curve to find the concentration of the unknown. Hint:

Use the calibration curve or linear regression equation to determine the concentration of FD&C blue dye No. 1 in Kool-aid. Food Coloring is 0.026 M in FD&C blue dye No. 1 7.5 x 10 -5 M is 29 mL -> 1000 mL

A purple solution is prepared by mixing 5.00 mL of the blue dye solution with 6.25 mL of red dye solution. The calibration curve for each color is provided. Measurement Result Measurement Blue dye stock solution (M) Result 0.1944 M Red dye stock solution (M) 0.2015 M Absorbance at 630 nm 0.00697 0.00193 Absorbance at 500 nm Calibration curve Calibration curve y=0.0682x y=0.0170x Part: 0 / 4 Part 1 of 4 Determine the theoretical molar concentration of each dye in the mixture. Round your answer to 3 significant digits. [Blue theoretical = M D [Red theoretical M X Part: 1/4 Part 2 of 4 Using the absorbance and calibration curve for each dye, calculate the experimental molar concentration of each dye in the mixture. Round your answer to 3 significant digits. [Blue] M Submit A Continue © 2022 McGraw I LLC. All Rights Reserved. Terms of Use | Privacy Center 12 W 10 O

The analysis of DDT in a water sample resulted to a peak area of 0.250. Calibration curve is NOT prepared since standard solutions are limited. Therefore, a 1.00 ppm DDT standard is spiked in the same water sample. This resulted to an increase in peak area. The peak area of the spiked sample is now 0.315. What is the DDT concentration in the water sample? 3.75 ppm 3.85 ppm 5.09 ppm 1.43 ppm 1.65 ppm Music off Zoom in

Determine concentration of OH- in a 0.724 M solution of Bro- (Kb = 4.0 × 10*). PREV 1 2 3 Based on your ICE table and Kb expression, determine the concentration of OH-. [OH] = %3D RESET 5.9 x 10-12 2.8 11.2 1.7 x 10-3 6.4 2.9 x 10-6 3.5 x 10-5

Measured value of pH at equivalence point: 8.18 Measured value of pH half-way to equivalence point: 4.04 Experimental value of Ka for acetic acid: Literature value of Ka for acetic acid, from lab manual/textbook: Experimental value of pKa for acetic acid:    Literature value of pKa for acetic acid, from lab manual/textbook: Discuss how you experimental values compare to the values in the laboratory manual or text book used in the accompanying general chemistry lecture course. Given the information above, how do you solve for the bolded items?

Table 1.0 of data showing calibration standards prepared by dilution and the absorbance Concentration CuSO4 (M) Volume of 0.5M (ml) Volume of D/Water (ml) Absorbance 0.00 0.10 0.20 0.30 0.40 0.50 II. 0.00 1.00 2.00 3.00 4.00 5.00 5.00 4.00 3.00 2.00 1.00 0.00 1. Construct a graph of concentration against absorbance, clearly show a best fit line. Find regression of your graph. Show how 0.000 0.406 0.638 0.854 1.202 1.276

A sample of explosives residue is dissolved in an appropriate solvent and is injected into HPLC. The column contains a non- polar stationary phase. The sample revealed three chemical compounds that are commonly present in homemade explosives. ТAТP DADP HMTD 1 2 3 4 5 6 7 8 Retention time (minutes) a) determine the retention time of TATP. b) which one elute first :DADP,TATP or HMTD? c) State and explain which compound is most polar. d) If you are investigating this terrorist attacks, state one way in which the information in the chromatogram would be useful.

concentration of unknown yellow dye (uM)

لا © Macmillan Learning H H-C-OH H₂/Pt HO-C-H $ % do LO 5 H₂C-OH OCT 11 <6 Y MacBook Pro Resources Q2Q Erase Select Draw Templates More /// C 0 H G c 2Q & * ( 7 8 9 0 ) U 0 P SUD