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Answer:
A salt-sand-water mixture is considered a heterogeneous mixture. Here's why:
- Heterogeneous mixtures have components that are not evenly distributed and can be visually distinguished.
- Homogeneous mixtures have a uniform composition throughout.
In a salt-sand-water mixture:
- Salt dissolves in water, forming a homogeneous solution (saltwater).
- Sand does not dissolve in water. It remains as solid particles.
You can clearly see the sand particles settling at the bottom of the mixture, separate from the saltwater. This indicates that the components are not evenly distributed, making it a heterogeneous mixture.
Even if you stir the mixture, the sand will eventually settle back down, proving that the mixture is not uniformly distributed.
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