Question

1. classify each of the following as a suspension, colloid, or solution. explain your reasoning. (hint: in some cases more than one answer may be possible.) a) a mixture is poured through a filter, and the entire mixture passes through. b) a mixture is left to stand for a while and small particles settle out. c) when viewed under a microscope, small particles are visible in the mixture. d) a beam of light passed through the mixture is scattered. e) the mixture is blue and transparent.

Explanation:

Step1: Recall mixture - type characteristics

Solutions have particles too small to see or settle out and pass through filters. Colloids have particles that don't settle out easily, can scatter light (Tyndall effect), and pass through filters. Suspensions have larger particles that settle out over time and don't pass through filters easily.

Step2: Analyze option a

Since the mixture passes through a filter and small particles settle out, it is a suspension. The particles are large enough to settle but small enough to initially pass through the filter.

Step3: Analyze option b

The visibility of small particles under a microscope indicates a colloid. Colloid particles are larger than solution particles but small enough to remain dispersed and be visible under a microscope. Also, the scattering of light (Tyndall effect) is a characteristic of colloids.

Step4: Analyze option c

The scattering of light by the mixture is a key characteristic of a colloid. Colloids exhibit the Tyndall effect due to the size of their dispersed particles.

Step5: Analyze option d

A blue and transparent mixture is a solution. Solutions are homogeneous mixtures where the solute particles are so small that they do not scatter light and the mixture appears transparent.

Answer:

a) Suspension. Explanation: Particles settle out and initially pass through filter.
b) Colloid. Explanation: Small particles visible under microscope and scatters light.
c) Colloid. Explanation: Scatters light (Tyndall effect).
d) Solution. Explanation: Blue and transparent, indicating small - sized solute particles.