Suppose you start with a 1.70 g sample of aspirin. After recrystallizing the sample, you have 1.34 g of aspirin. What is the percent recovery of aspirin in this recrystallization experiment? Type answer:
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- Read the Limit Test for salicylic acid in aspirin below then answer the question below. Remember: Aspirin = acetyl salicylic acid (ASA), and salicylic acid = SA Limit Test for salicylic acid: Extract powdered Aspirin tablets (i.e., active + excipient) containing 0.4g acetylsalicylic acid (i.e., active) with 4 mL of 95% ethanol. Add water to give a final volume of 100.0 mL and mix. Transfer 50.0 mL of the filtrate to a Nessler Cylinder and add 1.0 mL of acidified ferric ammonium sulfate solution. Mix and allow to stand. Prepare the standard solution used for comparison as follows: To another Nessler Cylinder add 3.0 mL of freshly prepared 0.01% (wt/vol) salicylic acid, 2.0 mL of ethanol, 1.0 mL of acidified ferric ammonium sulfate solution and sufficient water to give a total volume of 51.0 mL. Mix. A violet colour produced by the sample should not be more intense than that of the standard, used for comparison. Example of "Limit" calculations: Based on the above limit test, the…Convert the amount of spiperone in each sample to the concentration in the 1 ml total volume of assay tube. I have calculated amount of 3H spiperone in pmol in each dilution in second picture. To converted concentration in 1 ml total volume of each assay tube do I need to consider dilution factor？Concentration of a Sodium Chloride Solution Complete the following table as directed: Do not include units Report answers with the appropriate number of significant digits Do not use scientific notation Mass of empty evaporating dish (g) 29.625 Volume of NaCl solution (mL) 9.8 Mass of dish and NaCl solution (g) 40.307 Mass of dish and dry NaCl (g) 30.949 Mass of NaCl solution (g) ?????? Mass of dry NaCl (g) ????? Mass/mass percent (%) ?????? Mass/volume percent (%) ????? Moles of NaCl (mol) ?????? Volume of NaCl solution in liters (L) ?????? Molarity of NaCl solution (mol/L) ?????? (Concentration Calculations Guide)1. Calculate the mass of the NaCl solution as2. mass of NaCl solution=mass of dish with solution − mass of empty dish 3. Calculate the mass of dry NaCl as4. mass of dry NaCl=mass of dish with dry NaCl − mass of empty dish 5. Calculate the mass percent of the solution by dividing the mass of dry NaCl by the mass of NaCl solution and multiplying by 100.6. mass percent…
- Calculations/Results:*Show all work with units for each calculation below. Each answer must contain the correct units and the correct number of significant figures. Solute (Kool-Aid® powder; sucrose) Mass of solute ________________ Moles of solute ________________ Solution Volume of sucrose solution (in milliters) Volume of sucrose solution (in liters) _________________ Mass of sucrose solution (in grams) ___________________A 45% sucrose solution lost 240 mL by evaporation. After evaporation what is the sucrose concentration in the remaining 300 mL? Round your final answer to 2 decimal places if necessary.In carrying out the first standardization in this experiment, a student used 0.5169 g of potassium hydrogen phthalate (KHP) and 24.17 mL of a NaOH solution are needed to reach the equivalence point. What is the concentration (in mol/L) of the student's NaOH solution? Include only the numerical answer (no units). be careful with significant digit
- Standard strength aspirin tablets each contain 325 milligrams of acetylsalicylic acid. How many total moles of acetylsalicylic acid are present in a bottle containing 250 standard strength aspirin tablets?I have trouble solving this becaue I don't know how to convert the 3g of a random chloride to mL.Which piece of lab equipment is used to obtain a small, accurate volume from a stock solution for a dilution procedure? a) graduated cylinder b) pipet c) buret d) beaker e) none of the above
- To prepare the solution you would place the solute in a 50.0 ml volumetric flask, and then fill to the mark with water while mixing. This would give a total solution volume of 50.0 ml. The 5.0 solution needs to be diluted to make 10.0 ml of a 2.0% solution. What volume of 5.0% solution should be used? Please answer fast i give you upvote.When performing the gram stain, the Crystal Violet solution is composed of 20 mL of 95% ethanol in a final volume of 100 mL. If only 70% ethanol is available, how many mL of ethanol should be added to achieve a final volume of 1,000? Report your answer to 2 decimal places. Perform all calculations in a single step using Excel to avoid accumulated rounding error.What is the percent by mass of LiCl if 29 g of LiCl is used to make 283 g of solution? Answer : Units: