Solutions & Mixtures

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Salt is naturally found in the environment, and thus it was never invented. It is composed of nitrogen and chlorine, both of which are so volatile that they combine to form a new compound.

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  • What is the freezing point of gasoline?

    Q: What is the freezing point of gasoline?

    A: Gasoline may freeze at temperatures between negative 40 degrees Fahrenheitand negative 58 F. The exact freezing temperature depends on the properties of the individual constituents in gasoline.
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  • What is the difference between unsaturated, saturated and supersaturated solutions?

    Q: What is the difference between unsaturated, saturated and supersaturated solutions?

    A: An unsaturated solution contains less than the maximum soluble material, while a saturated solution contains all of the material that it is able to dissolve in its current state, with excess material remaining undissolved. A supersaturated solution holds more of the solvent than it would be able to under normal circumstances.
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  • Why does iodine sublime rather than melt and boil?

    Q: Why does iodine sublime rather than melt and boil?

    A: When iodine is heated, the intermolecular bonds are broken and the iodine goes directly to vapor from solid crystalline form. This is because the bonds are too weak to sustain liquid form under those conditions (slightly above room temperature and standard atmospheric pressure). If you were to continue heating the iodine, it would eventually melt at 113.6 degrees Celsius, and it would boil at 185 degrees C.
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  • Does acrylic shrink?

    Q: Does acrylic shrink?

    A: Acrylic shrinks when treated in a washer and dryer under moderate to high heat. Acrylic is synthetic, composed primarily of plastic and prone to deforming and shrinking during laundering.
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  • How fast does candy dissolve in water?

    Q: How fast does candy dissolve in water?

    A: How fast candy dissolves in water depends on how much candy is used, the temperature of the water, the composition of the candy and its surface area. The duration can range from minutes to hours or even longer. Candy is composed mostly of sugar, which is very soluble in water, so although the dissolving process should not take long, an exact figure is impossible to give without knowing all variables.
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  • What is pure water?

    Q: What is pure water?

    A: The purest water that is theoretically possible would consist of nothing but H2O molecules and exclude substances like minerals and salts. This maximum is never truly achieved for large samples in practice, so the term "pure water" has taken on different meanings that vary by the water's intended use.
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  • What is a dehydrating agent?

    Q: What is a dehydrating agent?

    A: A dehydrating agent is a substance that dries or removes water from a material. In chemical reactions where dehydration occurs, the reacting molecule loses a molecule of water. Sulfuric acid, concentrated phosphoric acid, hot aluminum oxide, and hot ceramic are common dehydrating agents in these types of chemical reactions.
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  • What is the chemical formula of kerosene?

    Q: What is the chemical formula of kerosene?

    A: Kerosene is a mixture of hydrocarbons and does not have a single chemical formula. The hydrocarbons in the mixture include compounds with 10 to 16 carbon atoms in both straight chain and branched formations.
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  • What are bricks made of?

    Q: What are bricks made of?

    A: Bricks are made with the two most abundant materials on Earth: clay and shale. These two materials are then put in a furnace, called a kiln, and heated to 2,000°F (approximately 1,100°C). By a chemical process (vitrification), the materials fuse together and form bricks.
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  • How do glow sticks work?

    Q: How do glow sticks work?

    A: According to Mental Floss, the luminescence inside glow sticks comes from a chemical reaction between two substances that releases energy as light. The exact chemical makeup of a glow stick can vary from manufacturer to manufacturer, but most use hydrogen peroxide and a chemical called a diphenyl oxalate ester. When the two liquids mix inside the glow stick, they produce a light colored by a phosphorescent dye.
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  • How do you neutralize caustic soda?

    Q: How do you neutralize caustic soda?

    A: Caustic soda is an inorganic compound that is a metallic base neutralized by acidic substances. The chemical name for caustic soda is sodium hydroxide, and it has the chemical formula NaOH. It is also known as lye.
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  • What is the difference between a solution and a suspension?

    Q: What is the difference between a solution and a suspension?

    A: A solution is a mixture featuring solutes that have been dissolved, while a suspension is a mixture of liquids also containing solid particles that may not completely dissolve inside the liquid. Materials that dissolve in liquids are considered soluble. When no more solute dissolves in a particular solvent while temperature remains the same, the solution is considered to be saturated.
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  • What are examples of solubility?

    Q: What are examples of solubility?

    A: An example of solubility is the fact that sugar is very soluble in water. However, in another liquid, such as methyl alcohol, it is only somewhat soluble.
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  • What is the difference between a pure substance and a mixture?

    Q: What is the difference between a pure substance and a mixture?

    A: A pure substance contains only one kind of molecule, and a mixture is a combination of two or more pure substances. Distilled water, aluminum foil and table sugar are each made from only one type of particle. However, salt water is a mixture because it contains salt as well as water.
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  • How do you identify heterogeneous and homogeneous mixtures?

    Q: How do you identify heterogeneous and homogeneous mixtures?

    A: Heterogeneous and homogeneous mixtures are identified by the level at which the mixtures blend together. Visible indications of different components within a mixture denote a heterogeneous mixture, while a uniform, single-component appearance indicates a homogeneous mixture.
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  • Does oil conduct electricity?

    Q: Does oil conduct electricity?

    A: Oils conduct electricity minimally under normal conditions, which makes them useful as insulators. The extent of electrical conductivity depends on the concentration of impurities. The presence of salts and other substances generally increases the electrical conductivity of oil.
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  • What is an example of a mixture?

    Q: What is an example of a mixture?

    A: Examples of mixtures include sand and sugar, alcohol and water, and flour and sugar. A mixture is a combination of two or more substances in which each substance retains its own chemical identity.
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  • Is helium gas used to fill a balloon a substance or a mixture?

    Q: Is helium gas used to fill a balloon a substance or a mixture?

    A: Most of the helium gas used to fill balloons is a mixture because commercial helium is seldom pure. Usually, it contains impurities in the form of nitrogen and oxygen gas. However, the helium present in this mixture is also a substance.
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  • Why does paint peel off walls?

    Q: Why does paint peel off walls?

    A: Peeling paint can be due to any of three common causes, including lack of surface preparation, moist walls and wrong paint, according to Red Beacon. If the wall underneath is dirty, wet or covered in old paint, the paint on top of the bad layer may not hold properly. One way to fix peeling paint is to paint the wall correctly after scraping off the malfunctioning layers.
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  • How does hydrogen peroxide kill bacteria?

    Q: How does hydrogen peroxide kill bacteria?

    A: Hydrogen peroxide kills bacteria by oxidizing their cell walls, stealing electrons from them and disrupting their chemical structures. Hydrogen peroxide is a compound with two hydrogen atoms and two oxygen atoms. It is very similar to water, but it has an extra oxygen atom that is shed readily to react with its environment, often in ways that are destructive to surrounding organisms.
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  • Is milk a mixture?

    Q: Is milk a mixture?

    A: Milk is a specific type of homogeneous mixture called a colloid. Examples of other commonly encountered colloids include prepared gelatin and fog. The particles in a colloid are large enough to see in direct light, but smaller than those found in a suspension.
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