Is salt water homogeneous or heterogeneous?  

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Salt water is made by mixing salt (NaCl) in water. It is a homogeneous mixture and a heterogeneous one. A difference between the two is that concentration is same everywhere in case of a homogeneous mixture, whereas, in case of a heterogeneous mixture, the concentration varies from place to place within a mixture. An easy test to check the homogeneous or heterogeneous nature of salt water is by tasting salt water taken from different points within the sample. A similar example of a homogeneous mixture is sugar water, that is, water containing sugar. An example of a heterogeneous mixture is trail mix, where we can mix various components in any fraction and after mixing find heterogeneity in component distribution. Same is the case with fruit salad.

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