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Mix 3 mL of ethyl alcohol, 1 mL of formic acid and 2 drops of conc. Sulfuric acid in the third test tube
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- Show how to take 3.6E-7 mol/L AgCl and convert it to g/100 mLDuring the lab procedure a filtered pipette was used to measure out 1.0 mL of the saturated salicylic acid solution. The filter had a bit of cotton on the tip. What component of the mixture was being filtered out?To which sample solution the spike will be add? the distillate>130C the mass standard the distilled <130C
- I have to make a solution that contains Toluene, ethyl acetate, and glacial acetic acid With a ratio of 55:45:3. How do I convert this to mL? Toluene = 55 Ethyl acetate:45 Glacial acetic acid: 3Prepare 250 mL stock acetic acid solutions and from this solution prepare 100 mL of eachstandard solutions (you have pippette with sensitivity of 0.1 mL). (0.015 M 0.030 M 0.060 M 0.090M 0.12 M 0.15 M)Which of the following will result to a dimly lit light bulb when subjected to the conductivity test? a. 1.0 M citric acid b. Glacial acetic acid c. Mixture of 10.0 mL 1.0 M Mg(OH)2 and 10.0 mL 1.0 M HNO3 d. 70% (v/v) ethanol
- How to prepare Saturated brine (NaCl) solution (50 mL)Why you should not start a titration with zero mL as an initial volume What is the use of white paper (or background) at the bottom of the erlenmeyer flask? How to deliver a droplet (a.k.a. partial drop or half drop) How to remove air bubbles in the buret Why remove air bubbles? Correct way to empty the contents of a volumetric pipet Arrangement of volume markings on the buret Steps to properly clean and rinse the buret With how many trials or replicates should titrations be performed? Difference between end point and equivalence point? Which hand should be holding the Erlenmeyer flask? How should the meniscus be read?Which one of the following is NOT a source of error during a titration? Group of answer choices Adding too much sodium hydroxide solution to the analyte Refilling the buret during a titration trial Rinsing the buret with the analyte Adding indicator to the analyte
- Make oleic acid vesicles by making a solution of 0.5mL of 50mM oleic acid, 1 mM HPTS in 0.2 M Tris-HCl, 50 mM NaCl, pH 8.5 (i.e. buffer A) in a microcentrifuge tube in the following order. How much HPTS should you add? How much oleic acid?ANALYSIS OF VINEGAR A 25.00 mL vinegar sample was diluted to 250-mL using a volumetric flask. A 50.00 mL aliquot portion of the dilute vinegar solution needed 35.45 mL of 0.1200 M NaOH to reach the phenolphthalein end point. Calculate the number of mmoles of acetic acid present in the 50-mL aliquot portion that was titrated.Chemistry Rx Cocaine HCl 1.5% (E = 0.16) Eucatropine HCl 1.5% (E = 0.18) Chlorobutanol 0.5% (E = 0.24) Make isotonic Disp: 30 mL a) How much sodium chloride should be added to make the above solution isotonic? b) If boric acid (E = 0.52) was used to make the solution isotonic how many grams should be used?