Total Suspended Solids Dried at 105°C . Preparing clean and dry filter paper: Finalized filter paper weight (g) Filtrating the water sample: Empty dish + Clean filter paper weight (g) Sample volume (mL) Empty dish + filter paper with dried residue weight (g) Total suspended Solids (mg Total Suspended Solids /L) (Round to zero decimal point) Set 1 0.2458 Set 1 37.8186 10 38.0628 24420 Average (Round to zero decimal point) Precision check (Round to four decimal point) Sample volume in measurement cell (cuvette) (mL) Measured absorbance Measured concentration (mg/L) Dilution factor Actual concentration (mg/L) (Round to zero decimal point) Measuring total suspended solid using Merck Spectroquant Items Set 2 0.2458 Set 2 37.8186 10 38.0628 24420 24420 0 Values 6 0.705 319 1

Total Suspended Solids Dried at 105°C . Preparing clean and dry filter paper: Finalized filter paper weight (g) Filtrating the water sample: Empty dish + Clean filter paper weight (g) Sample volume (mL) Empty dish + filter paper with dried residue weight (g) Total suspended Solids (mg Total Suspended Solids /L) (Round to zero decimal point) Set 1 0.2458 Set 1 37.8186 10 38.0628 24420 Average (Round to zero decimal point) Precision check (Round to four decimal point) Sample volume in measurement cell (cuvette) (mL) Measured absorbance Measured concentration (mg/L) Dilution factor Actual concentration (mg/L) (Round to zero decimal point) Measuring total suspended solid using Merck Spectroquant Items Set 2 0.2458 Set 2 37.8186 10 38.0628 24420 24420 0 Values 6 0.705 319 1

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter14: Chromatography

Section: Chapter Questions

Problem 9P

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=.01002 mo B. PREPARE 20 mL of ~ 1M Cacla. 50ml using a balance, weigh out the calculated mass of CoCl₂ 21₂0 M = 2.00×10-4 Into a tared 150ml beaker. Record actual mass of Salt used. Calculated actual masses should agree to + 1.0g of better. Use a graduated cylinder to add 20.0ml of DI water to Flask. Stir Solution w/ stirring rod or a stir bar & Stil plate until the salt is fully dissolved. A better description of the concentration of a solution prepared in this manner is weight percent (wt%.) units, calculated as (g solute/g solution) x 100%, where g solution -g solute + g solvent Calculate report wt% of Ca²t of this solution, water density being 1.0 g/ml 24 Approximate mass of Calla-2H-0 Actual mass of Ca Cl₂ 2H₂0 weighed Wt7. Cata calculation 2.94 2.9470g Chemistry 88, No. 3 (2016) average mass per atom or w
Total Suspended Solids Dried at 105°C Table 2.2: Preparing clean and dry filter paper: Finalized filter paper weight (g) Filtrating the water sample: Empty dish + Clean filter paper weight (g) Sample volume (mL) Empty dish + filter paper with dried residue weight (g) Total suspended Solids (mg Total Suspended Solids /L) (Round to zero decimal point) Set 1 0.2458 Set 1 37.8186 10 38.0628 24420 Average (Round to zero decimal point) Precision check (Round to four decimal point) Use the formula below to find the precision check Set 2 0.2458 Set 2 37.8186 10 38.0628 24420 24420 Precision: Check precision whether agree within 5% of their sum using following equation: [](1st sample result – 2nd sample result) | / sum of 1st and 2nd sample] x 100 < 5
1. The following data were obtained after the moisture and total ash content determination of acacia powder: Wt. of empty crucible 52.452 g Wt. of crucible & sample 61.648 g Wt. of crucible & sumple after drying to constant wt. 60.502 g Wt. of crucible and residue left after incineration 53.006g • Moisture content in grams • Total ash content in grams Percent total ash 2. Find the acid numher of a rosin sample weighing 1.100g which required 28.00 ml. of 0.1100 N NaOH to bring the endpoint. 3. Find the SV of cottonseed oil if a 1.532 g of sample, refluxed with 25 mL of about 0.5 N alcoholic KOH, required 15.70 ml of 0.5100 N HCI for the residual titration. The hlank was run using the same volume of 0.5 N alcoholic KOH and required 26.00 ml of 0.5100 N HCI to bring about the endpoint 4. If a sample of white wax is found to have an ester value of 65.7 and a saponification valuc of 74. What is the acid value of the sample? 5. Determine the iodine value of an unknown sample of oil weighing…
The aqueous solution of acetic with a flow rate of 1000 kg/hr contains 30% acetic acid by mass and will be extracted in a countercurrent multistage process with pure isopropyl ether (IPE) to reduce the acetic acid concentration in the final raffinate phase (LN) to 2% by mass. a) Calculate the minimum solvent flow. b) Determine the theoretical number of steps required when using a solvent of 1.5 minimum solvent flow rate. c) Determine the number of theoretical steps using the McCabe-Thiele method. Chart. Acetic acid (A)-Water (B)-isopropyl ether (IPE) (C) LIQUID-Liquid Balances at 1 atm pressure and 293 K Water layer (%) Water (B) Isopropyl ether layer (%) Water (B) 0.6 Acetic acid (A) IPE (C) Acetic acid (A) IPE (C) 98.8 1.2 99.4 99.3 98.9 0.69 98.1 1.2 0.18 0.5 1.41 97.1 1.5 0.37 0.7 2.89 95.5 1.6 0.79 98.4 91.7 1.9 1.0 97.1 6.42 13.30 25.50 36.70 1.9 93.3 4.82 11.40 2.3 84.4 71.1 3.4 3.9 84.7 71.5 21.60 31.10 58.9 4.4 6.9 58.1 48.7 10.6 10.8 45.1 37.1 44.30 46.40 16.5 36.20 15.1…
The scatter plot below shows the density of ethylene glycol solutions vs. the mass % of those solutions. Density (g/mL) 1.04+ 1.03- 1.02- 1.01 0.99- 0.98- 8 % 10 12 14 16 18 20 Mass % Q The equation for the line of best fit shown on the scatter plot is y= 0.001683 +0.9959. Use the equation of the trendline to determine the mass percent of an ethylene glycol solution with a density of 1.015 g/mL.
In part A.3. as the sample cools, moisture from the atmosphere condenses on the outside of the evaporating dish, before the mass is measured. The presence of the condensed moisture will the reported TDS in the water sample. O leave unchanged decrease double O half O increase
College of Teacher Bachelor of Secondary Education *promoting pedagogical excellence elor of Sec omoting pedage RIN ht: (a) (b) Br. C. CH3 b1. HNO3, H2SO4 2. Fe, H30*r H2/Pd s / oD Br NO2 (c) KMN04 7 (d) Cl CH3CH2CH2CI AICI3 H20 7. OCH3 4. Predict the major product(s) of the following reactions: OM (a) CI (b) CH CH CH3CH2C! AICI3 CH3CH2COCI AICI3 (c) CO2H HNO3 (d) N(CH2CH3)2 H2SO4 SO, H2SO4 ASITY
dings OWLV2 | Assig X MindTap - Cen X MindTap - Cen X G amu of ca - Go X b My Questions 7/static/nb/ui/evo/index.html?elSBN=9781337790840&id%=299783426&snapshotld%=785765& * CENGAGE MINDTAP Chapter 8: Chemical Composition f. 0.000301 mole of strontium fluoride Answer + 39. Calculate the number of molecules present in each of the following samples. a. 4.75 mmol of phosphine, PH3 b. 4.75 g of phosphine, PH3 c. 1.25 × 10-2 g of lead(II) acetate, Pb(CH3CO2), d. 1.25 x 10-2 moles of lead(II) acetate, Pb(CH3CO2)2 e. a sample of benzene, C, H6, which contains a total of 5.40 moles of carbon 40. Calculate the number of molecules present in each of the following samples.
Sample IdentificationCodeConcentration of M%TA=2-log(%T)Q50004.00 x 10-417.90.75Q50013.20 x 10-425.00.6Q50022.40 x 10-435.70.46Q50031.60 x 10-450.20.3Q50048.000 x 10-570.80.15SampleIdentificationCode%TA=2-log(%T)AMQ0210150143.70.359518560.360.000192Q0210150244.10.355561410.360.00018Q0210150343.80.358525890.360.00017Q0210150444.10.355561410.360.00018Q0210150543.80.358525890.360.00017What was their percent error?43%Does Batch 021015 meet legal requirements?No, because it is not between 2.85 * 10(4) and 3.15 * 10(4)Well #DropsBluedye1234567891012345678910Drops 9Distilled water876543210Concne 0.26tration0.52Test Tube #0.781.041.3Solutions3Concentration (M)2.082.32.6Concentration (ppm)1:1 dilution11.82Starting Dilution21.562:1 dilution0A.Zero standard0Was your calibration curve as linear as you expected?B.Did you experience any â€œdriftâ€ of the resistance readings?C.What is the equation of your best-fit line?D.What commercial drink did you analyze?E.Assuming…
20 Carbamazepine tablets were found to weigh 10.000 g in total. The tablets were ground to a fine powder using a pestle and mortar. A 313.2 mg sample of the powder was boiled with 25ml ethanol for a few minutes. The hot mixture was stirred in a closed flask for 10 minutes and filtered through sintered glass. The flask and filter were washed with ethanol and the washings combined with the filtrate. The cooled mixture was made up to 100ml with ethanol (soln A). 5ml of the ethanol extract was diluted to 250ml with ethanol (soln B) and the absorbance of the resulting solution was found to be 0.598 absorbance units at a wavelength of 285nm. The A1%,1cm was 490? a) Calculate the total amount (in mg) of carbamazepine in solution B (1 decimal) Answer = mg b) Calculate the total amount (in mg) of carbamazepine in solution A (1 decimal) Answer = mg c) Calculate the amount (in mg) of carbamazepine in a single tablet. (1 decimal) Answer =
2. Calculate the total and volatile solids (TS and TVS), suspended solids (SS), volatile suspended (VSS) and dissolved solids (TDS) based on the following data: Total solids data I Weight of empty dish = 85.317 g Weight of dish + dry solids = 85.500 g Weight of dish + ignited solids = 85.375 g Volume of wastewater sample = 85 mL Suspended solids data Weight of glass fiber filter (GFF) = 0.1300 g Weight of GFF + dry solids = 0.1520 g Weight of GFF + ignited solids = 0.1396 g Volume of wastewater sample = 200 mL
Data Collection Mass of 2 Vivarin tablets (g) 0.728 Mass of crude caffeine (g) 0.567 Mass of recrystallized caffeine (g) 0.519 Calculations Percent by mass of caffeine in Vivarin tablets (w/w%) Percent isolation of caffeine (%) Caffeine melting point (lit) (°C) Caffeine melting point (expected) (°C) - provide an expected melting point of the product. Questions If the solubility of caffeine in water is 2.2 mg/mL at 25 °C,180 mg/mL at 80 °C, and 670 mg/mL at 100 °C, explain why the first step in the separation is to heat the ground up tablets. Normal BIIIU X2| X² | → fx | Ix