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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  • What type of mixture is silver nitrate in water?

    Q: What type of mixture is silver nitrate in water?

    A: Silver nitrate, or AgNO3, mixed with distilled water is a solution. A solution is a homogeneous mixture where one substance dissolves in another substance. Explained by ABetterChemText, the solute is broken down completely into individual ions or molecules. In water, AgNO3 disassociates into Ag+ ions and NO3- ions.
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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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  • 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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  • 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 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 types of metals do magnets stick to?

    Q: What types of metals do magnets stick to?

    A: Magnets stick to any metal that contains iron, cobalt or nickel. Iron is found in steel, so steel attracts a magnet and sticks to it. Stainless steel, however, does not attract a magnet.
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  • Why are oil and water immiscible?

    Q: Why are oil and water immiscible?

    A: Water and oil do not mix because of their molecular properties. On one hand, water has a slight positive charge and is attracted to atoms and molecules with a negative charge. Oil is an electrically neutral substance and has no affinity for water. Water molecules also have high surface tension and are strongly attracted to each other. A surface-active intermediary is necessary for water and oil to mix.
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  • Is bleach flammable?

    Q: Is bleach flammable?

    A: Bleach, which is essentially chlorine dissolved in water, is not a flammable substance on its own. If mixed with certain materials such as ammonia or acetylene, it can become unstable, forming explosive compounds or reactions.
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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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  • 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 are some examples of viscous liquids?

    Q: What are some examples of viscous liquids?

    A: Some examples of highly viscous liquids are oils, honey, glycerin, tar and sulfuric acid. Viscosity is the ability of substances, especially fluids, to resist flow. It can also be referred to as the measure of the ability of a liquid to resist being deformed by extensional stress.
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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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  • 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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  • 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 another name for a homogeneous mixture?

    Q: What is another name for a homogeneous mixture?

    A: Another name for a homogeneous mixture is a solution. The term "solution" is more frequently used when a homogeneous mixture is a liquid, although it is sometimes used if the homogeneous mixture is a gas. Another name for a solid homogeneous mixture of metals is an alloy.
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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 are examples of insoluble substances?

    Q: What are examples of insoluble substances?

    A: Examples of insoluble substances are sand, plastic, wood, metal, glass and cloth. These substances never dissolve in water or any other solvent at room temperature and pressure. Sugars and inorganic salts are also examples of insoluble substances. Insoluble substances cannot be extracted from a solution.
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  • What is the difference between a mixture and a compound?

    Q: What is the difference between a mixture and a compound?

    A: A mixture is formed when two or more substances are physically mixed together. A compound is formed when two or more substances are chemically combined through a chemical reaction. The components of a mixture can be separated with relative ease, whereas the components of a compound are almost impossible to separate without a chemical reaction.
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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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  • 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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  • Why do ionic compounds dissolve in water?

    Q: Why do ionic compounds dissolve in water?

    A: Ionic compounds dissolve in water because the hydrogen and oxygen atoms in the H2O molecules have partial charges that attract the ions in the solid compound, causing it to dissociate into separated ions. Differences in electronegativity account for the partial positive charge carried by water's hydrogen atoms and the partial negative charge of its oxygen atoms. What is happening to the ionic compound when it dissolves is a separation of its ions from their preexisting solid crystal lattice structure into unattached ions that are free to move about in the solution.
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