1AL F23 Exp 09 Acids in the Environment A Report Sheet-2

Before  Investigating the scene the technician must dilute the luminol solution to a concentration a 2.00 × 10-2 M. The diluted solution is then placed in a spray bottle for application on the desired surfaces. How many moles of luminol are present in 2.00L of the diluted spray?

Current Attempt in Progress From the curves shown in Animated Figure and using the following Equation, determine the rate of recrystallization for pure copper at the several temperatures. Make a plot of In(rate) versus the reciprocal of temperature (in K-1). (a) Determine the activation energy for this recrystallization process. (See Section FACTORS THAT INFLUENCE DIFFUSION.) (b) By extrapolation, estimate the length of time required for 50% recrystallization at room temperature, 20°C (293 K). (a) i kJ/mol (b) i days

Procedure: Step 1: Pipet 25 mL of prepared sample solution, which has been prepared into a 250 mL Erlenmeyer flask. Step 2: Add 3-5 drops of phenolphthalein indicator solution to the sample solution in the 250 mL Erlenmeyer flask. Step 3: Rinse the buret with three 10 mL portions of standardized 0.1 M HC1 acid solution, before fill this acid solution into the buret and record the initial volume of this acid solution in the burette. Step 4: Titrate the sample solution with the standardized 0.1 M HC1 to the endpoint and record the final volume of this acid in the burette. (Note: phenolphthalein endpoint is from pink color to colorless) Step 5: Repeat the titration for two more times. Step 6: Repeat the same procedure from step 1 to step 5 by using methyl orange as an indicator rather than phenolphathelein. (Note: methyl orange endpoint is from orange to red color). Calculate the alkalinity of the sample for both the indicators and potentiometric method using the following equation: [Alk]…

Color BEFORE adding Color AFTER adding Intensity of color AFTER adding FeCl3 Test Tube # FeCl3 FeCl3 #1 (salicylic acid) clear lilac 100% #2 (commercial aspirin A) clear slightly pink 50% #3 (commercial aspirin B) clear lilac 95% #4 (aspirin from your clear pink 20% synthesis above) #5 (control) clear clear 0% Based on this data and the melting point of Aspirin, how pure is the synthesized product?

Can I please get help with this graph, if you could show exactly where it needs to pass through please.

Using C1V1=C2V2

help please answer in text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all working

Make an excel plot of InK versus ( s(). sp Insert a linear trendline and have the equation displayed on the chart. Record the value of the slope and the y-intercept of the trendline. Upload the graph in the Lab Report Submission link in Blackboard. kp 11 Solubility and Thermodynamics Lab Checker.htm ownload Exp 11 Solubility and Thermodynamics Lab Checker.htm (91.1 KB) Temperature of Crystal Solubility in M Ksp Formation in Kelvin 341 Correct 7.6 Correct 57.76 Correct 343 Correct 6.8 Correct 46.24 Correct 346 Correct 5.8 Correct 33.64 Correct 348 Correct 5.2 Correct 27.04 Correct 350 Correct 4.7 Correct 22.09 Correct Value or Calibration Curve M Incorrect or Calibration Curve 0.0026 M Incorrect ง

Standardization of EDTA Solution Weight of pure CaCO3: 0.2514 g % Purity of CaCO3: 98.0% Total volume of standard CaCO3 solution: 250.00 mL Using the information given in the table, show a step-by-step process to compute the missing values. Take note of the % purity and total volume. Trial 1 2 3 Volume of standard CaCO3 solution (ml)  25.00  25.00  25.00 Final Volume Reading EDTA (ml)  24.30  47.95  24.72 Initial Volume Reading EDTA (ml)  0.00  24.30  0.20 Volume of titrant, EDTA (ml)        Molarity of EDTA (M)

Hello! Could you please answer this with one long dimentional analysis like I am supposed to do it? Thank you!

The labware we used in Quant Lab is divided into “qualitative” or “quantitative” analytical purpose.  One of the important laboratory skills we learned is to know what specific apparatus is appropriate for the task at  hand.  For the following procedures, which SPECIFIC glassware, or balance ( CORRECT NAMES, be specific ) should be used?  Measure out 2 mL of concentrated H2SO4 solution to dissolve the copper oxide ore sample.. _________________   Deliver 10.00 mL of the stock fluoride solution to be diluted to 100 mL. ________________________    Weigh out about 0.42 g of NaF standard to be dried in an oven.

I need help understanding how to do this, can you please show me how you get the CFU/mL

The labware we used in Quant Lab is divided into “qualitative” or “quantitative” analytical purpose.  One of the important laboratory skills we learned is to know what specific apparatus is appropriate for the task at  hand.  For the following procedures, which SPECIFIC glassware, or balance ( CORRECT NAMES, be specific ) should be used?    Weigh about 2 g of solid KI to be added to the sample solution. ___________   Obtain a unknown water sample to be diluted to 250 mL for the determination of its hardness. ____________   Collect washings from the crucible suction to see if the AgCl precipitate still contains unreacted silver (I). _________

Please help

Concentration of TZ stock solution (μMμM) 42.06

Part B Before investigating the scene, the technician must dilute the luminol solution to a concentration of 8.00x102 M. The diluted solution is then placed in a spray bottle for application on the desired surfaces. How many moles of luminol are present in 2.00 L of the diluted spray? Express your answer with the appropriate units. • View Available Hint(s) Tempjetes Symbols undo redo Teset keyboard shortcuts Help Value Units moles of luminol =

Table 1: Volumes in of iodine in mL used to titrate mixtures of 10 mL of reaction mix and 10 mL of urine. student trial 1 trial 2 trial 3 total volume (mL) a 12.6 11.8 12.5 300 290 b. 10.6 10.7 10.6 11.1 118 12. 10.9 405 13.0 12.5 349 mg vit. C mL iodine TV (mL/hour) 10 mL urine aliquot TVC (mg/hour) =7 (mL) · CF !! What is the hourly vitamin C excretion rate (mg/h) of student b if the CF is 1.06? (include no more than two decimals in your answer, e.g.: 123.45, and do not type the units) 10.6 need ASAP

HELP !!!!!!!!! PLEASE HELP ME ON THE DARK BULLET POINT TABLE CALCULATION. BE SURE UPLOAD THE GRAPH. make sure Answer all of them     Experiment 1 Exact concentration of H2O2 stock solution (M) 1.014 Temperature of water bath (°C)  24   Experiment 1: Volume of O2 vs time for decomposition of H2O2   Time (min) Volume of O2 (mL)2.0 0.00 4 1.22 6 2.41 8 3.64 10 4.93 12 6.34 14 7.78 16 9.49 18 10.99 20 12.35 22 14.64 24 16.31 26 19.16 28 20.97 30 24.52 32 26.03 34 28.99 36 32.30 38 35.17 40 38.83 42 44.83 44 50.50 46 58.26 48 63.46   Experiment 2: Volume of O2 vs time for decomposition of H2O2   Time (min) Volume of O2 (mL)2.0 0.00 4 0.63 6 1.31 8 1.96 10 2.42 12 2.93 14 3.56 . Experiment 3: Volume of O2 vs time for decomposition of H2O2   Time (min) Volume of O2 (mL)2.0 0.00 4 0.45 6 0.88 8 1.44 10 2.29 12 2.92 14 3.51  Calculations For all three experiments plot the volume of O2 evolved in…

Dissolution Distilled H20 Concentration 0.01 M HCI Concentration (mg/ml) Time Total amount A Total amount A (mg/ml) (mg) (mg) 5 0.16 0.1 10 0.24 0.18 15 0.35 0.25 20 0.48 0.34 25 0.58 0.4 30 0.67 0.5 1. Plot the given data on an ordinary paper and find the slope for each line then calculate the IDR constant for aspirin in the two dissolution media, water and HCI. NOTE: Slope of the calibration curve = 1.0 (mg/ml and saturation solubility of salicylic acid is equal to 2.0 gm/L.

Is this calculation correct? See image below....

During lab, a student used a Mohr pipet to add the following solutions into a 25 mL volumetric flask. They calculated the final volumes added, which are recorded below. The student then followed the directions in the manual to make the stock solution. Volumes Used to Create Stock Solution   Volume 0.200 M Fe(NO3)3 (mL) Volume 0.00200 M KSCN (mL) Stock Solution 9.60 mL 2.55 mL Using the stock solution above, the student made additional dilutions, with the final volumes below. Calculate the concentration of iron(III) thiocyanate ion in Standard 2. For grading purposes, report your answer in mM with four places after the decimal.

Based on the data given answer questions. 1,3, and 5 please ?? Question 2 is already answered to solved 1 and 3 1. Based on your three trials, discuss the precision of your data 2. The actual concentration of the unknown is 0.200 M. (Check with instructor to ensure that this value is accurate.) Calculate the percent error based on the average molarity of your three trials. Answer: Actual Molarity= 0.200M Mcalculated = 0.1755M % error = ( [actual - calculated value]/actual ) *100 Putting values; = ((0.200 - 0.1755)/0.200 )*100 = 12.25% 3. Based on your answer to (2), discuss the accuracy of your data. 5. 80.0 mL of 0.30 M NaOH and 80.0 mL of 0.30 M HCl are mixed together. What is the approximate pH of the solution —acidic, basic, or neutral? Explain.

To enter exponential values, use the format 1.0e-5. Solution 1.10 M Acetic acid (mL) 0.900 M Sodium acetate (mL) [H30*] (M) 1 8.00 2.00 2 7.00 3.00 3 6.00 4.00 4 5.00 5.00 4.00 6.00 6. 3.00 7.00 7 2.00 8.00 8 1.00 9.00 LO

A sample of rainwater was collected from four separate locations across theMetroplex. Each sample was measured once by two separate methods for the presence ofsulfate. Determine whether the two methods are equivalent with respect to giving thesame answer for [SO42-].

Please give the full calculation + explanation for each step.

Instructions You are required to produce a short lab report using the information given in the accompanying document, ‘Lab report assessment_student data’. This document introduces an experiment, and also provides a set of experimental data for this experiment. You are required to use this data to perform steps 8 and 9 of the procedure. This includes calculations of a particular value, and then comparison to the true value. Consider any experimental errors when comparing calculated values and true values. Your report should be between 300 and 500 words (including all table contents and titles of tables and graphs). Your lab report should consist of three sections only: • Experimental • Results and Discussion • Conclusion You do NOT need to include an introduction section. Your experimental section should be written in appropriate lab report format, (passive voice, 3 rd person, in paragraphs). Your results and discussion section should contain the data presented in table format, and…

A student was given a stock ascorbic acid solution of 2.323 mg/L. Following the directions in the lab, the student obtained the data below. Calculate the concentration of ascorbic acid in the Standard (in microgram/L, ug -). Report your answer with one place after the decimal. initial final initial volume final volume volume volume color reagent color reagent stock stock solution solution solution solution Standard 1.35 mL 6.64 mL 5.12 mL 9.32 mL

Concentration of AR Stock Solution (ppmppm) 21.22   Unrounded Rounded Concentration of AR Stock Solution (μMμM) 42.7461 42.7

Line equation?