Is pencil heterogeneous or homogeneous

Answer 1

Not usually.

In an ordinary pencil for writing, there is a sharp boundary between the writing substance called "lead", even though it is actually mostly graphitic carbon, and a protective coating, most often of wood, that protects the writer's hand from being stained by the lead. Some artist pencils may not have any such protective covering and therefore may be homogeneous mixtures.

Homogeneous mixtures are mixtures that have definite, true composition and properties. Particles are uniformly spread. For example, any amount of a given mixture has the same composition and properties. Examples are solutions and some alloys (but not all). A homogeneous mixture is a uniform mixture consisting of only one phase. Examples are gasoline and margarine.

A solution is a homogeneous mixture of two or more substances (the solutes) dissolved in another substance (the solvent).

Solutions have all particles within the size of atoms, small molecules or small ions, less than 1nm in all dimensions . A common example would be a solid dissolving into a liquid (i.e. salt or sugar dissolving in water or gold into Mercury).

Liquids dissolve into one another, and sometimes liquids dissolve into gases, for example water vapor and the atmosphere. Common examples include soft drinks, where carbon dioxide is trapped in the liquid through carbonation. Several solution properties collectively called colligative properties change as a function of solute concentration. Solubility is a compound property.

Answer 2

Yes, A pencil is a mixture because it can be separated. A mixture is a mix of substances that can be unmixed - like some cereal, the actual cereal can be taken out of the mix to become independent.

Answer 3

No, it is a heterogenous mixture. "homosexual" means same so homogenous mixtures are made up entirely of one thing. A pencil is made of wood, graphite/lead, rubber, aluminum, and paint so it is made of many things. "hetero" means different so a pencil made of different things is considered heterogenous.

Answer 4

"Pencil lead" is more correctly called graphite which is an allotrope of carbon. It is not a mixture as it is a pure element (obviously consisting of carbon atoms). It is an interesting non-metal as it can conduct electricity.

Answer 5

An ordinary pencil is a heterogeneous mixture, as evidenced by a difference in color between the "lead"* that actually deposits on a surface to form writing from the pencil and the covering that protects the writer's hand from being marked at the same time. If the main part of the cover is wood, as usual, there is usually another distinct finishing paint or similar material that forms the outermost part of the cover.

Some drawing pencils used by some artists do not have coverings, and these may be homogeneous mixtures, as artists' chalk usually is. White chalk might be a compound, calcium carbonate, but usually contains some other material as a binder.

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*Actually usually mostly graphite.

Answer 6

It consists of several substances. It has a graphite core, which often has other material in it. Around the core is some wood. The wood often is painted. Some pencils also include an eraser, so there is rubber there and often a metal surround, to help hold it in position.

Answer 7

A pencil is heterogeneous. It contains a variety of substances including wood and graphite.

Answer 8

I maybe wrong but pencil lead consists of graphite, wax and clay making it a mixture. So what type of mixture is a pencil?

Feel free to share answers it would really help.

nev

Answer 9

yes