is salt a mixture or a pure substance?
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A pure substance consists of a single element or compound. Iron is formed only of iron (Fe) atoms; table salt is formed only by sodium chloride (NaCl) molecules. A mixture, however, is made up of different compounds and/or elements. When salt is added to water to make saltwater, it becomes a mixture.
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Ordinary table salt is called sodium chloride. It is considered a pure substance because it has a uniform and definite composition. All samples of sodium chloride are chemically identical. Water is also a pure substance.
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throughout the matter). A material composed of two or more substances is a mixture. Elements and compounds are both examples of pure substances. A substance that cannot be broken down into chemically simpler components is an element.
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Mixtures can have any amounts of ingredients. Mixtures are unlike chemical compounds, because: The substances in a mixture can be separated using physical methods such as filtration, freezing, and distillation.
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Does the presence of two types of atoms mean that water is not really a pure substance after all? A substance is considered pure if it contains only a single type of atom, such as gold, or a single combination of atoms that are bonded together, such as a water molecule.
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It is also made up of the same particles. An element is an example of a pure substance because it cannot be broken down into simpler substance. Examples of pure substances would be: H2O (water), neon (an element), and NaCl (table salt). Salt crystals - but that are dissolved in water.
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Salt water is an example of what kind of mixture? It is a homogenous mixture because the salt is evenly mixed with water.
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Pure Substances A pure substance consists of a single kind of matter. It always has the same composition and the same set of properties. For example, baking soda is a single kind of matter, known chemically as sodium hydrogen carbonate.
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Any material that is not a mixture, is called a pure substance. Pure substances include elements and compounds.
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A homogeneous mixture is a mixture in which the composition is uniform throughout the mixture. The salt water described above is homogeneous because the dissolved salt is evenly distributed throughout the entire salt water sample. ... One characteristic of mixtures is that they can be separated into their components.
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['ELEMENT: Is a substance made up of same type of atoms having same atomic number. Eg: Na, Cl etc.', 'MIXTURE: Is a substance in which two or more than two substances combine together in a variable ratio. ... ', 'COMPOUND: Is a substance in which two or more than two substances combine together in a fixed ratio.']
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Homogeneous Mixtures A homogeneous mixture is a mixture in which the composition is uniform throughout the mixture. The salt water described above is homogeneous because the dissolved salt is evenly distributed throughout the entire salt water sample.
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Any substance is said to be pure if and only if it is made up of a single type of particles means all the particles of that substance should be of same chemical nature. For example water, sugar, salt, Sodium, Tin, etc. Class 9th Science Chemistry.
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Homogeneous Mixtures The difference is that the composition of the substance is always the same. The amount of salt in the salt water can vary from one sample to another. All solutions would be considered homogeneous because the dissolved material is present in the same amount throughout the solution.
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Examples of pure substances include tin, sulfur, diamond, water, pure sugar (sucrose), table salt (sodium chloride) and baking soda (sodium bicarbonate). Crystals, in general, are pure substances. Tin, sulfur, and diamond are examples of pure substances that are chemical elements.
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A homogeneous mixture has the same composition throughout. Another example of a homogeneous mixture is salt water.
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Sugar, salt, and baking soda are pure substances that are compounds. Examples of pure substances that are crystals include salt, diamond, protein crystals, and copper sulfate crystals. Depending on who you talk to, homogeneous mixtures may be considered examples of pure substances.