Review the difference between homogeneous and
heterogeneous mixtures. Explain how you can tell the difference between a
suspension, a solution, and a colloid. Explain how you classified the following:
milk, table salt and water, baking soda and water, chalk dust and water. Then,
make a hypothesis about what kind of mixture tea is. Respond to your classmates
and compare their responses with yours.
Colloids and suspensions are both heterogeneous mixtures because the different components are visible to the naked eye. A solution is a homogeneous mixture because the different components are not visible to the naked eye. Milk is a colloid, chalk dust and water is a suspension and the other two are solutions. I think that tea in a tea bag is a heterogeneous mixture and in a cup is a homogeneous one. Daniel G
ReplyDeleteDaniel, good job summarizing the characteristics of the two main types of mixtures! I would add to your comment that milk is a colloid because even though its different components don't separate in different phases (as suspensions do), we can see its particles when we put light in it. My hypothesis is that a hot tea infusion would be a heterogeneous mixture because we can see the different components apart (tea leaves and rest of the mixture). Laura W.
ReplyDeleteI would like to say that I agree with my classmates comments so far. Also, I thought I'd add that suspensions are heterogeneous mixtures where its different components settle in separate phases. A good example of a suspension is muddy water. Colloids (like milk and blood) are heterogeneous mixtures in which the fat globules aren't completely dissolved in the fluid of the solvent (i.e. dissolving media). I think that tea is a homogeneous mixture as long as we can't see any of its different components apart. Pamela S.
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