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) 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

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) 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

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
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
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…
02:21 4G File Details 4CH003/UM1: Fundamentals of... Place a thermometer into the mixture and cool the flask in a water bath until the temperature is below 200C. Remove the flask from the water bath and carefully add cyclohexanol (10ml, 9.6g) to the acid mixture. Cyclohexanol is only slightly soluble in water so you should observe two immiscible layers at this point. Dissolve sodium dichromate dihydrate (10.5g) in water (5ml) in a 25ml conical flask and, using a dropping pipette, add this solution carefully drop by drop to the cyclohexanol/sulphuric acid mixture over about 30-40minutes. Swirl the flask vigorously during the addition process and maintain the temperature of the mixture in the round bottomed flask between 25-35°C during the addition by immersion of the flask in the cold water bath. If the dichromate solution is not added slowly, a rapid rise in temperature will occur and the reaction will become violent. 3 When all the dichromate solution has been carefully added rinse…
(17 (17 /courses/159861/files?preview=69941104 G Gmail Frage b Ac (PISU Fil الولايات المتحدة الفن @ Science Problem Set 2.pdf W- # 2 r 3 S»>> F2 Dissolved substances Az+ H* Solid substances Az Az₂O Liquid substances H₂O E (a) 0.991 V Why You Don't Ne... 80 F3 $ DS Page of 2 Arizonium (Az) is a newly discovered element. Below is a Table listing the chemical potentials at 300 K of the A+ cation and the Az₂O oxide. A t 4 (a) 5.5 E R 6. Determine the standard potential (Az* = 1M) for the reaction: Az* +e™ = Az (a) 0.400 V. (b) 0.500 V (c) 0.700 V (d) 0.800 V 7. Determine the standard potential for the reaction: Az₂O + 2H+ + 2e = 2Az +H₂O (b) 0.701 V (c) 0.698 V (d) 1.203 V F 000 000 8. Calculate the equilibrium constant, K, for the chemical reaction:2Az* + H₂O=Az₂O + 2H+ (a) 10-11.3 (b) 10-10.1 (c) 10-6.0 (d) 10-16.4 9. Determine the pH value at which the potential for the two reactions, Azt +e=Az and Az₂O + 2H+ + 2e = 2Az +H₂O, intersect. (b) 6.2 1¹9 ق % 5 O Juj M Int μº chemical…
Countercurrent Multistage Washing of Ore. A treated ore containing inert solid sulfate is to be leached in a countercurrent multistage gangue and copper extractor using pure water to leach the CuSO4. The solid charge rate per hour consists of 10000 kg of inert gangue (B), 1200 kg of CuSO, (solute A), and 400 kg of water (C). The exit wash solution is to contain 92 wt % water and 8 wt % CuSO4. A total of 95% of the CuSO, in the inlet ore is to be recovered. The underflow is constant at N Calculate the number of stages required. 0.5 kg inert gangue solid/kg aqueous solution.
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.
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.
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
Balanced Chemical Equation MnO4- +5Fe2+ +8H+ --> Mn2+ + 5Fe3+ +4H2O Details mass (g) sample average molarity of KMNO4 solution final buret reading initial buret reading volume (mL) of the KMnO4 solution delivered amount (mmoles) KMnO4 needed to reach the end point amount (mmoles) Fe2+ reacted with KMnO4 amount (mmoles) Fe2+(NH4)2 (SO4)2 (6H20) mass (g) Fe2+(NH4)2 (SO4)2 (6H2O) present in the sample %Fe2+(NH4)2 (SO4)2 (6H2O) Trial 1 0.2284 9 mL 0 9 mL 0.18477 0.9239 0.9239 Trial 2 0.2132 0.02053 11 mL 0 11 mL 0.22583 1.1292 1.1292 Trial 3 0.2081 10 mL 0 10 mL 0.2053 1.0265 1.0265
Mganga is doing a routine analysis in a copper plating factory. He is regularly making up solutions of verypure CuSO4.5H2O. He suspect that a batch of a reagent used to make up a stock solution of CuSO4.5H2Ois impure and it may contains some CuCl2. He asked you to determine the percentage impurity as follows:Dissolve1.500g of a mixture and make up to 1.00L mark.150mL of this solution was treated with 20.00mLof 0.100M AgNO3 to remove 98.6% of chloride as AgCl precipitate.