Examples of solvents include water, acetone, turpentine and ethanol and examples of solutes include salt, sugar, iodine and copper sulfate. A solvent must have the same polarity as the solute. An important phrase in chemistry is "like dissolves like."Know More
"Like dissolves like" refers to the fact that polar solutes will dissolve in polar solvents and non-polar solutes will only dissolve in non-polar solvents. Polar solutes cannot dissolve in non-polar solvents. Water is a polar solvent, salt and sugar are both polar solutes. To dissolve iodine, which is non-polar, a solvent such as ethyl acetate would be needed and it would not dissolve into water.
The polarity of each solvent or solute substance depends on the covalent bonds it has between atoms. When two non-metal atoms bond, two electrons are shared between each of them. In covalent bonds, the electrons shared by each of the atoms are attracted to the nucleus of both atoms. The two forms of covalent bonding are polar and non-polar. Non-polar bonds are formed with an equal sharing of electrons between atoms. Polar bonds are formed when the sharing of electrons are uneven. Ionic bonds happen when there is a complete transfer of electrons between atoms. These ionic solutes can dissolve in both polar solvents and ionic solvents.Learn more about Solutions & Mixtures
Sugar water freezes faster than salt water, because salt has more molecules than sugar. Normally, water freezes at 32°F, however, when a substance is added to the water, it lowers its freezing point. This is not because of the chemical nature of the substance being added, but rather the number of molecules. This is referred to as a colligative property.Full Answer >
Examples of conductors include the human body, metals, aqueous solutions of salt, graphite, copper, silver and gold. Conductors are materials that can transfer heat and transmit electricity. Conductors have a high density, allowing particles to flow freely and collide.Full Answer >
A biuret solution is a liquid mixture of potassium hydroxide and copper sulfate used to detect proteins and peptides in human urine. In this alkaline solution, the copper sulfate ions react with the peptide bonds of proteins to turn the blue solution violet if protein is present.Full Answer >
Sugar dissolves more quickly in hot tea than in iced tea because the solubility of solutes in solvents generally increases with an increase in temperature, according to Rutgers University. The heat provides energy to break the molecular bonds in the solid, causing it to dissolve faster.Full Answer >