Given the following situation, choose the best course of action: measuring 5.0 g of volatile 99% ethanol O in weighing bottle, use analytical balance O in paper box, use analytical balance O in erlenmeyer flask, use top loading balance O in beaker, use triple beam balance
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- Explain two separation techniques how may be feasible for H2O vs Ethanol. One can be an industrial approach other can be a laboratory-scale method.Choose the one correct or one incorrect statement regarding filtration: gravity filtration uses a Buchner funnel, filtering flask and negative pressure filter paper should be wet with solvent to seal it to the funnel before filtering the solution collected in the filtering flask is called the residue vacuum filtration is most often used to remove impurities from a solution the solution to be filtered should completely fill the top of a Buchner funnelPreparation of 0.25N NaOH Objective: Apparatus and Materials: Procedure : Calculate the exact mass of NaOH needed to prepare 1.0L of 0.25N NaOH for standardization. Show your computations. Using the triple beam balance, weigh the desired amount of NaOH. Place the weighed amount of NaOH into the 500 mL volumetric flask and add distilled water until it reaches the mark. Agitate and transfer the solution into the reagent bottle. Add again distilled water to the same volumetric flask until it reaches the mark and pour it to the same reagent bottle, thus having a total volume of 1.0 L. Label the reagent bottle, 0.25N NaOH. Data and Computations: Conclusion:
- For each of the following situations, choose the best measuring apparatus that can be used. Weighing 18.00 g NaOH Top loading balance analytical balance triple- beam balance Weighing 0.7455 g KCl Top loading balance analytical balance triple- beam balance Measuring exactly 5.00 mL of 0.100 M HCl solution 5ml volumetric piptette 5ml measuring piptette Graduated cylinder Preparing a 10.0-mL 2.00 M NH3 solution 10ml volumetric flask 10ml beaker Graduated cylinderTRUE OR FALSE __________ 11. The minimum number of centrifuge tubes in a centrifuge machine during its operation is one. __________ 12. Never place reagents directly onto the weighing pan of a balance, always use weighing paper, a beaker, or some other container. __________ 13. To transfer a solution, the stirring rod touches the delivery point of the reagent vessel and the wall of the receiving vessel. __________ 14. An open flame is the heat source for heating or evaporating flammable liquids. __________ 15. Most chemicals used in experiments can be discarded into the sink.Design a procedure on how you will prepare 1.25 M table sugar (C12H22O11)solution and 1.25 M table salt (NaCl) solution diluted to 1 L water. Perform three trialseach set-up and get the average. Write/ encode your output in short bond paper withthe following parts:Title____________________I. Objectives:II. Materials:III. Procedure (including pictures/diagrams):IV. Data:V. Generalization:
- In order to carry out a highly accurate determination, usually of a valuable constituent in a material of large bulk such as gold, a chemist will carry out a_______________ Select one: Determination Assay Analysis Assessment Background checkUsing the percent purity calculations, determine the percent yield of synthesis of aspirin. Part I Synthesis of Aspirin Mass of salicylic acid used (g) 2.029g Volume of acetic anhydride used (mL) 5ml Mass of acetic anhydride used (vol. × 1.08 g/mL) 5.4g Mass of aspirin synthesized (g) 3.256g Part II Melting Temperature Data Melting temperature (°C) 133°C Part III Salicylic Acid Standard Stock Solution Initial mass of salicylic acid (g) 0.210g Moles of salicylic acid (mol) 0.0147 mol Initial molarity of salicylic acid (M) 0.724 M Part III Beer’s Law Data for Salicylic Acid Standard Solutions Trial Concentration (M) Absorbance Water (mL) 1 10 0.301 0 2 7.5 0.219 2.5 3 5.0 0.163 5.0 4 2.5 0.074 7.5 Best-fit line equation for the salicylic acid standards Test of the Purity of the Synthesized Aspirin Initial mass of aliquot of product (g)…When answering this problem, report the answer with the appropriate number of significant figures. When entering units, use proper abbreviated units with proper capitalization. A beverage drink mix sample is prepared by mixing a packet of beverage powder in a gallon (3.78 L) of water. A sample for analysis is prepared by diluting 10.00 mL of this solution in a 50.0 mL volumetric flask. When measured using a colorimeter, this diluted solution has an absorbance of 0.349. The calibration curve for the experiment yielded a linear fit of y = 21655x+0.0318 and an R2 value of 0.9911. Determine the molar concentration of food dye in the analyzed sample. Answer: _____x10____ _____units
- I got a task in analytical chemistry to calibrate, standardize, verify and validate an analytical balances, can you help me?A fly ash aerosol of monodisperse particles with a density of 2.0 g/mL and particle diameter of 10.0 mm has a concentration of 1000.0 mg/m3. Calculate the settling velocity in cm/s and the settling rate in g/m2-s. Please answer very soon will give rating surely5.00 mL of stock solution is diluted to 25.00 mL, producing solution ALPHA. 10.00 mL of solution ALPHA is diluted to 25.00 mL, resulting in solution BETA. 10.00 mL of solution BETA is then diluted to 25.00 mL, producing solution GAMMA. dilution factor for ALPHA from stock solution = 0.167 dilution factor for BETA from ALPHA solution = 0.0476 part c and d?
