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Diffusion Transitional Reasoning Practice

Chemistry · Matter · Chemistry · Particle Model of Matter

1 Chemistry practice questions on Diffusion. Questions that build towards applied reasoning.

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Questions

  1. 1.

    A student investigates diffusion by placing an identical crystal of a soluble purple dye at the bottom of two identical beakers, one filled with water at 15 °C and the other with water at 50 °C, keeping both mixtures completely undisturbed. After several minutes, the purple color spreads throughout the entire volume of the warmer water much faster than in the cooler water. Based on the particle model of matter, which statement best explains this experimental result?

    • A) Individual dye particles expand and become less dense at 50 °C, causing them to float rapidly toward the surface.
    • B) Water particles at 15 °C remain completely stationary, preventing any movement of the dissolved dye particles.
    • C) Higher temperature increases the average kinetic energy of the particles, causing them to move faster and disperse more rapidly through random collisions.
    • D) Heating alters the chemical composition of the dye particles, transforming them into lighter gas particles that diffuse faster.

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