Solutions & Mixtures

A:

The solubility of sucrose in water at 20 degrees Celsius (60 degrees Fahrenheit) is 204 g sucrose/100 g water. Solubility varies with the temperature of the solution. As the temperature of the water rises, more sucrose can be dissolved.

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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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  • 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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  • 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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  • 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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  • 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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  • 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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  • 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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  • 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 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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  • 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 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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  • 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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  • 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 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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  • 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 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 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 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 does "solute" mean in science?

    Q: What does "solute" mean in science?

    A: A solute is the smaller part of a solution, which in many cases is said to have been dissolved by the solvent. A solution is any mixture that is homogeneous at a molecular level, which means that any given volume of the solution has about the same proportion of type of molecule in the overall solution as the overall solution.
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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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  • 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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