Classify each of the following as a pure substance or a mixture:
Drag the appropriate items to their respective bins.
Reset
Help
a cheese sandwich an iron (Re) nail a soft drink
a cheese sandwich - mixture
an iron nail - pure substance
a soft drink - mixture
A cheese sandwich: Mixture
An iron (Re) nail: Pure substance
A soft drink: Mixture
To classify each of the items as a pure substance or a mixture, we need to understand the definitions of these terms:
1. Pure substance: A pure substance is made up of only one type of particle or molecule. It cannot be separated into other substances by physical means. Examples of pure substances include elements and compounds.
2. Mixture: A mixture is made up of two or more substances that are physically combined. Mixtures can be separated into their individual components using physical methods, such as filtration or distillation. Mixtures can be classified into homogeneous mixtures (uniform composition) or heterogeneous mixtures (non-uniform composition).
Now, let's classify each of the items you provided:
- Cheese sandwich: This is a mixture. It consists of bread, cheese, and possibly other ingredients like condiments or vegetables. These components can be easily separated and have different properties.
- Iron (Fe) nail: This is a pure substance. It is made up of only one type of atom, iron. Iron nails cannot be separated into other substances by physical means.
- Soft drink: This is a mixture. Soft drinks contain various components such as water, dissolved sugars, flavorings, carbon dioxide, and sometimes preservatives or other additives. These components can be separated, and the composition of the drink can vary.
Therefore, the classification would be as follows:
- Cheese sandwich: Mixture
- Iron (Fe) nail: Pure substance
- Soft drink: Mixture