Practice Mixture in Chemistry
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
A physical combination of two or more substances that are not chemically bonded, retain their individual properties, exist in variable proportions, and can be separated by physical means such as filtration, distillation, or evaporation.
Things stirred together but not joined. Each substance keeps its own properties.
Example 1
easyDefine a mixture and explain how it differs from a pure substance. Give two examples.
Example 2
mediumA student has a clear, colorless liquid. Describe two experimental tests to determine whether it is a pure substance or a mixture.
Example 3
mediumExplain why mixing iron filings and sulfur powder produces a mixture, but heating them together produces a compound (\text{FeS}). How could you distinguish between the two?
Example 4
hardSeawater contains dissolved salts (\sim 3.5\%), dissolved gases, and suspended particles. Classify seawater as a type of mixture and outline a procedure using at least three separation techniques to isolate the dissolved salt, fresh water, and suspended particles.