Question

valerie wants to examine the properties of a thick liquid but is finding it difficult to pour the liquid into a beaker. she needs to finish her investigation before the end of class. which method will allow her to pour the liquid easily?

• boiling the liquid vigorously
• applying heat to the liquid
• placing the liquid in the refrigerator
• mixing the liquid with another solution

Explanation:

To determine the correct method, we analyze the effect of each option on the viscosity of a thick liquid. Viscosity (thickness) of most liquids decreases with heat as molecules gain energy and move more freely.

• Boiling vigorously (first option) is excessive and may cause splashing or unwanted changes, not just easy pouring.
• Applying heat (second option) increases the liquid’s temperature, reducing viscosity, making it easier to pour.
• Refrigeration (third option) increases viscosity (makes it thicker), worsening the pouring issue.
• Mixing with another solution (fourth option) is unpredictable; it may not reduce viscosity and could alter the liquid’s properties, not a reliable method for easy pouring.

Answer:

B. applying heat to the liquid