Which type of intermolecular attraction (dispersion force, or hydrogen bond) exists in each of the following liquids? hydrogen bond hydrogen bond dispersion force hydrogen bond Predict which liquid in each pair has the higher boiling point. CH3COOH C2H5OH If the molecules in a liquid are weakly attracted, which of the following properties has a high value? vapor pressure (high when attraction is low) boiling point is low (it is only high when molecules are strongly attracted) viscosity is low (it is only high when molecules are strongly attracted) surface tension is low (it is only high when molecules are strongly attracted) Distinguish between a solid and a liquid at the molecular level. Solids and liquids differ at
* The negatively charged Cl- ions are attracted to the positively charged poles of hydrogen molecules. * Many biologically important organic substances do not ionise and also don’t dissolve in water. This is because they form hydrogen bonds for example the hydroxyl groups of sugar molecules. * When something is dissolved in water it is called an aqueous solution * Water has a high polarity which allows it to dissolve things (shown by salt example) The thermal properties of water * Water has a boiling point of 100oC and a freezing point of 0 oC * This is compared to similar compounds with the same relative molar mass there is also a wider temperature range. * This is due to the way the molecules react with each other.
BF4 has four bonding pairs and zero lone pairs on the middle B atom, so the molecular geometry is tetrahedral in BF4. 2(d) Since Ammonia has hydrogen-bonding intermolecular forces it is able to be more soluble in h20 than phosphine because ammonia is able to h-bond with water unlike phosphine because it only has dipole dipole forces. 2006 AP Chemistry Free-Response Questions 3(ai) In the pure glucose there is Hydrogen Bonding, dipole-dipole, and London dispersion forces. 3(aii) In the pure cyclohexane there is only dispersion forces shown. 3(b) Since glucose is polar, it is soluble in the polar solvent of water.
A solvent is the substance in which the solute is being dissolving. Water Water is chemically H2O. Water molecules are formed when two hydrogen molecules and one oxygen molecule combine. Water is a good solvent due to its polarity. When an ionic or polar compound enters water, it is surrounded by water molecules Salt or Sodium Chloride Salt is a mineral that is composed primarily of sodium chloride (NaCl), a chemical compound belonging to the larger class of ionic salts.
This energy is indestructible and is converted to light and heat. c. If you accidentally spill sodium chloride into a stove while cooking, it does not melt It is an ionic compound and the forces attract between the positive and negative ions, I ionic compounds they have a strong ionic bond and it takes a lot of energy to break. A high can only melt the table salt. 6) a. Which pairs will react from an ionic compound?
These electrons are located in the outermost electron cloud, since metals have a very low electro negativity their electrons flow freely about. Since these electrons are floating freely about and since there are so few of them there is plenty of space, these same electrons move farther and farther away from the nucleus making the attraction between the electrons and protons very weak. As a result of this the electrons move into a “sea of electrons”. Metals low affinity for their electrons is the reason why many metals lose their electrons during chemical reactions to elements with higher oxidation states and a greater need for electrons. The reason that the HCL was able to dissolve the copper penny was because the HCL had a higher affinity for electrons then the copper did.
The water molecules being more attracted to themselves than to either the oil molecules or the molecules making up the large sediment particles. When we add adding aluminum sulfate and calcium , This makes the substances immiscible; that is, it keeps the oil and the sediments from dissolving in the water • Al2(SO4)3 + 3 Ca(OH)2 = 2 Al(OH)3 + 3 CaSO4 3. What is activated carbon and why is it used for water purification? • Activated carbon is a form of carbon that has been processed to make it extremely porous and thus to have a very large surface area available for adsorption or chemical reaction. Activated carbon used for home water treatment typically contain either granular activated carbon (GAC) or powdered block carbon.
If tempered glass is broken it won’t shatter into tiny pieces, it will shatter into big pieces instead. It is also known, as safety glass because when it shatters it won’t hurt you. An interesting fact about tempered glass is that it is chemically strengthened by a surface finishing process. The surface finishing process is when the glass is submersed in a bath containing potassium salt. This causes sodium ions to be replaced by potassium