4 differences between compounds and mixtures
Answers
Answer:
Compound Mixture
Definition A compound contains atoms of different elements chemically combined together in a fixed ratio. A mixture is a combination of two or more substances where there is no chemical combination or reaction.
Composition Compounds contain different elements in a fixed ratio arranged in a defined manner through chemical bonds. They contain only one type of molecule. Elements that compose the compound are chemically combined. Mixtures contain different elements and compounds but the ratio is not fixed nor are they combined via chemical bonds. The ingredients are physically mixed but chemically separate. Often they are visibly distinct.
Examples Water (H2O), Sodium chloride (NaCl), Sodium bicarbonate (NaHCO3) etc. Salt in water; pasta and sauce; sand; pebbles; solutions such as rubbing alcohol, dental amalgam, vapor in air; colloids such as mayonnaise, milk, cheese; coarse suspensions such as mud in water, oil in water.
Ability to break down A compound can be separated into simpler substances by chemical methods/reactions. A mixture can be separated into simpler substances by physical or mechanical methods.
Representation A compound is represented using its chemical formula that represents the symbols of its constituent elements and the number of atoms of each element in one molecule of the compound. Mixtures cannot be represented by chemical formulas.
Chemical and physical properties Compounds have specific chemical and physical properties that are distinct from their constituent elements because the constituent elements lose their properties when they combine to make the compound. Mixtures do not have specific, consistent chemical and physical properties of their own. They reflect the properties of their constituent substances, which retain their original properties. e.g. chocolate milk retains properties of chocolate and milk
Types A huge, virtually limitless, number of chemical compounds can be created. Compounds are classified into molecular compounds, ionic compounds, intermetallic compounds and complexes. Solids, Liquids and Gases can be combined to create a mixture. Mixtures can be homogeneous or non-homogeneous.
Mass ratio Compounds have specific mass ratios. e.g. pyrite has 46.6% iron and 53.4% sulphur by mass. This is true of all pyrite no matter the sample size. Mixtures have a variable mass ratio depending upon what quantities of ingredients have been combined in the mixture
Compound:
A compound is a substance that can be split into simpler substances by chemical means.
Mixture:
A mixture is a impure substance which can be split into two or more pure substances by physical means such as filtration sublimation and distillation.
Difference:
Mixture is a impure substance while compound is a pure substance.
The components can be present in any proportions in mixture but the constituents in a compound must be present in a fixed proportion.
In mixture the components show their individual properties while the constituents of a compound do not show their individual properties.
the components of mixture can be separated by physical means while the constituents of a compound cannot be separated by physical means.
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