1.Why is it difficult to get substances in pure form in nature?
2.Name a liquid that is heavier than water and is not miscible in water?
Think about the many different paths a reaction can take.
Carbon tetrachloride is considerably heavier than water.
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Why is it difficult to get substances in pure form in
1. It is difficult to obtain substances in pure form in nature due to the presence of impurities. In nature, substances are often found in combination with other elements or compounds, forming mixtures. These mixtures can be very complex and consist of various components with different physical and chemical properties. Separating and isolating these substances from their natural sources requires a purification process, which can be challenging and time-consuming.
To obtain a substance in its pure form, one needs to employ different methods of separation and purification. Common techniques include filtration, distillation, crystallization, chromatography, and extraction. By utilizing these methods, it becomes possible to separate and remove impurities, eventually obtaining the substance in a pure state.
2. An example of a liquid that is heavier than water and is not miscible with water is oil. Most commonly, we encounter vegetable oil, mineral oil, or petroleum-derived oils. These oils have a lower density than water, causing them to float on the water's surface. However, certain oils, such as some types of silicone oil or bromobenzene, have a higher density than water. When poured into water, these oils sink, demonstrating their higher density.
Additionally, these heavier oils are not miscible or soluble in water, meaning they do not mix with water to form a homogenous solution. Instead, they form separate layers, with the oil floating or sinking depending on its density relative to water.