In a physical science class, four students are experimenting with distinct techniques for dissolving laundry soap in water. Each student mixes 20 grams of soap with 1000 mL of water. The table illustrates the varied methods employed by each student. Darien used a solid cube water temperature 50c and his method of combination was no stirring. Heather used powder, 105C water and vigorous stirring, Abdullah used a solid cube 50C water and gentle stirring, and Larissa used powder 75C water and gentle stirring.

Among the options provided, which sequence most likely represents the order in which the students' laundry soap completed dissolution, ranging from the first to finish to the last?

(1 point)
Responses

Abdullah → Darien → Heather → Larissa
Abdullah → Darien → Heather → Larissa

Larissa → Abdullah → Heather → Darien
Larissa → Abdullah → Heather → Darien

Heather → Larissa → Abdullah → Darien
Heather → Larissa → Abdullah → Darien

Darien → Abdullah → Larissa → Heather

1 answer

To determine the order in which the laundry soap likely dissolved for each student, we should consider the factors influencing solubility: the form of the soap (powder vs. solid cube), water temperature, and stirring method.

  1. Darien used a solid cube of soap in water at 50°C with no stirring. This method is generally the slowest since no agitation helps the soap dissolve.

  2. Heather used powder soap in water at 105°C with vigorous stirring. The high temperature and vigorous stirring greatly enhance dissolution rates.

  3. Abdullah used a solid cube of soap in water at 50°C with gentle stirring. This method will be faster than Darien's due to gentle stirring, but still slower than the powder form.

  4. Larissa used powder soap in water at 75°C with gentle stirring. The powder form will dissolve faster than a solid cube, and while the temperature is lower than Heather’s, the lack of vigorous stirring could slow the process compared to Heather's method.

Based on the reasoning above, the most likely order of dissolution from fastest to slowest is:

  1. Heather (powder, 105°C, vigorous stirring)
  2. Larissa (powder, 75°C, gentle stirring)
  3. Abdullah (solid cube, 50°C, gentle stirring)
  4. Darien (solid cube, 50°C, no stirring)

Thus, the correct sequence that reflects this reasoning is:

Heather → Larissa → Abdullah → Darien.