Question

bin 2: drops on a penny (soap vs plain water):
property of property of water is the main reason why more drops of plain water can fit on a
penny than is soapy water.
(adhesion
adhesion
hydrogen bonds
universal solvent
polar
high specific heat
surface tension
capillary action
density
explain what the property of water you chose is, and why
you chose it, in your own words:
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Explanation:

To determine the property of water explaining why more plain water drops fit on a penny than soapy water, we analyze the options:

• Surface Tension: Water molecules exhibit strong cohesion (attraction to each other) due to hydrogen bonding. This creates a “skin - like” surface (surface tension) that allows water to form a dome on the penny. Soap reduces this cohesion by interfering with hydrogen bonds, lowering surface tension. So plain water, with higher surface tension, can stack more drops before spilling, unlike soapy water with reduced surface tension. Other properties (e.g., adhesion, polarity) don’t directly relate to the ability to form a cohesive, domed layer on the penny.

Answer:

The property is Surface Tension. Surface tension is the cohesive force between water molecules (due to hydrogen bonds) that creates a strong, “stretchy” surface. Plain water has high surface tension, so its molecules stick together tightly, forming a dome on the penny to hold more drops. Soap weakens this cohesion, lowering surface tension, so fewer soapy water drops fit.