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- During the mixing step, briefly discuss why gentle mixing of the solution is necessary after the addition of ferric chloride? How does this impact the next step of sedimentation?How will the calculated molarity of the solution be affected if solid particles splatter out of the flask during the drying process? Explain. How will the calculated molarity be affected if the solute residue is not dried thoroughly? Explain.A 2.0 g of MgCO3 was dissolved and diluted to exactly 500-mL volumetric flask. If 50-mL aliquot was used in the analysis, what is the weight of MgCO3 present in the aliquot sample
- Why does grinding solid crystals increase the rate of dissolving of a solid solute in water?Each compound of the solute mixture is adsorbed with different forces, which causes it to move over the stationary phase at different speeds, this is known as: a.adsorption effect b. solvent flow rate C. partition effectWhy is recrystallization not applicable to samples which contain large amount of impurities?
- Briefly explain why crystals form as the solvent cools during recrystallization.How does the volume of a solvent affect the purity of the material in recrystallization?Why does it take a long time for a polymer (PVA) to dissolve in water when a similar mass of sugar (sucrose) or NaCl will dissolve easily?
- In recrystallization, is it always good to have a high % recovery? Explain. What are the advantages and disadvantages of recrystallization?You measure your drug concentration in solution at ten minutes and an hour. You get 2 mg/ml at ten minutes and 12 mg/ml at an hour. What is the equation you would use and what is your dissolution rate? Be sure to include units.Once you choose the appropriate solvent, how much solvent should you add to your sample to dissolve? What do you think could happen if you add too much solvent? What could be a reason for your sample not dissolving in the appropriate solvent?