i need the anwser of questions of 6,7,8 Laboratory Questions Asmer Ah Circle the

Question

i need the anwser of questions of 6,7,8

Laboratory Questions Asmer Ah Circle the questions that have been assigned. as one large piece. 1. Part A 1. The aluminum sample is not cut small pieces but rather left Explain. a. How will oversight affect the into completing the oversight? Explain. this progress of by the b. Will the percent yield of the alum be too high, too low, or unaffected 2. Part A 3. Aluminum pieces inadvertently collect on the filter. too high or as too low? Explain. Explain. a. If left on the filter will the yield of the alum be reported as the observation b. If the aluminum pieces are percent what steps would be used to remedy detected on the filter, 3. Part A 4. In a hurry to complete the synthesis, Jerry used 6 M HCl, also on the reagent shelf, instead of the 6 M H so, As a result, describe what observation he would expect in Part A.6. Explain. 4. Part 4. Andrea used too much sulfuric acid. hat observation would she expect in Part A.6? 5. AT why the alum crystals are washed free of impurities with ethanol ice-water mi rather than with room-temperature deionized water. 6. Part A 8. Explain why a percent yield of greater than 100% might be reported for the synthesis of an alum. 7. Part B.2. Explain why the melting point of your prepared alum must either be equal to or be less than the actual melting point of the alum. Consult with your laboratory instructor. 8. Experimentally, how can the moles of the waters of hydration in an alum sample be determined? See Experiment 5 9. A greater yield and larger alum crystals may be obtained by allowing the alum solution to cool in a refrigerator overnight or for a few days. Explain. 206 Synthesis of Potassium Alum

Explanation / Answer

Q6.

It might be reporeted since alum can be reported hydated, or dry, tehrefore, if we added mass of water, and did NOT account for it, then the mass of sample wil be higher than that calculated theoretically

Q7

It must be either equal (pure) or less (impurities)

It is must likely less, since there might be impurities or even hydrated molecules, which lower the boiling point

Q8.

We can detect moles of water /hydrate if we:

- Evaporate in the oven/furnace the H2O molecules, so the final sample is "dry"

i.e

Mass of water = Initial sample - final sample mass

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.