- Classify each of the following as a pure substance or a mixture- if.docx
- 1. . Classify each of the following as a pure substance or a mixture; if it is a mixture, state whether it or homogeneous: (a) concrete, (b) tomato juice, (c) marble, (d) seawater, and (e) iron. 2. Sugge st a way to determine whether a colorless liquid is pure water or a salt solution without tasting it. 3. What distinguishes a mixture from an impure substance? 4. Define the process of sublimation. 5. How do decantation and filtration differ? Which should be faster? 6. Why should you never weigh a hot object? Solution 1. Only iron is pure substance, rest all are homogeneous mixture . 2 .Pure water will be clear and and salt solution will have some colloidal particles suspended in water and these can be seen with naked eye . 3.A mixture is made while impure substance is self made . Mixture is a combination of two different substance for any purpose but impure substance have undesirable foreign substance in a pure substance . 4.Sublimatio ; when upon strong heating any solid directly changes into the gas without undergoing liquid phase , is called sublimation .