Solutions & Mixtures

A:

In science, the term "insoluble" is used to describe substances with a low solubility. Solubility is the ability for a substance to dissolve when mixed with another substance to form a new compound.

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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 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 happens when you mix bleach and ammonia?

    Q: What happens when you mix bleach and ammonia?

    A: Mixing bleach and ammonia produces toxic gases called chloramines that can damage the upper respiratory tract and irritate the eyes, throat and nose. Symptoms include coughing, shortness of breath, watery eyes and nausea. Prolonged exposure to chloramines in an enclosed space can cause death, particularly if a person has any pre-existing respiratory conditions.
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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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  • How do you separate alcohol and water?

    Q: How do you separate alcohol and water?

    A: To separate alcohol from water, you must heat the solution, evaporate the ethanol into vapor, cool it down and condense it back into a liquid using a distillation apparatus. This process is called distillation, and it is used to separate a pure liquid from a liquid mixture. Distillation works for liquids that have different boiling points.
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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 an acceptable range of TDS in drinking water?

    Q: What is an acceptable range of TDS in drinking water?

    A: The Environmental Protection Agency establishes a recommended range of TDS in drinking water at 500 parts per million or lower. The total dissolved solids represent the accumulated content of organic and inorganic substances contained in water.
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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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  • Does salt dissolve faster in hot or cold water?

    Q: Does salt dissolve faster in hot or cold water?

    A: An equal amount of salt in hot and cold water dissolves at about the same speed. However, the same amount of sugar added into hot and cold water dissolves faster in the hot water than in the cold water.
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  • What are the two parts of a solution?

    Q: What are the two parts of a solution?

    A: The two parts of a solution are the solvent and the solute. When the two parts combine to make a solution, the properties of the solution differ from the properties of the two individual parts.
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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 examples of concentrated solutions?

    Q: What are examples of concentrated solutions?

    A: Common commercial examples of concentrated solutions are hydrochloric acid and sulfuric acid. Hand soap, soft drinks and liquid medicine are concentrated solutions commonly found in the household.
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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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  • What type of acid is in vinegar?

    Q: What type of acid is in vinegar?

    A: Vinegar contains acetic acid. Acetic acid is derived from alcohol, as bacteria in the air turn it from ethanol to acid, though the acid is diluted in commercial vinegar.
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  • Who invented salt?

    Q: Who invented salt?

    A: 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 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 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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  • Why does iodine turn starch blue?

    Q: Why does iodine turn starch blue?

    A: Starch when mixed with Iodine turns a deep shade of blue because starch contains amylose. Amylose is a soluble component of starch as well as other carbohydrates.
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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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  • What is a solution in scientific terms?

    Q: What is a solution in scientific terms?

    A: In scientific language, a solution is a mixture of at least two substances in which the particles of the substances are of atomic or molecular size. A solution is a homogeneous mixture, which means that all parts of the mixture are exactly the same as every other part.
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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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