PreparED Study Materials
Study Guides
Videos
Determining Bond Types: Ionic, Polar Covalent, or Covalent in Chemical
Want To Learn More? To watch the entire video and ALL of the videos in the series:
This discussion revolves around the classification of chemical bonds as ionic, polar covalent, or covalent based on the electronegativity difference between the atoms involved. The general criteria for this classification are explained: a difference greater than 1.7 indicates an ionic bond, between 0.5 and 1.7 signifies a polar covalent bond, and less than 0.5 designates a covalent bond. It then applies these criteria to four specific examples, including the CC bond in ethane (H?CCH?), the KI bo
Reactions of Isopentyl Bromide with Various Reagents
Want To Learn More? To watch the entire video and ALL of the videos in the series:
Explore the fascinating reactions of isopentyl bromide with a variety of reagents and uncover the expected products in each scenario.
Pseudo-Noble Gas Configurations: A Unique Path to Atomic Stability
Want To Learn More? To watch the entire video and ALL of the videos in the series:
Discover the concept of the pseudo-noble gas configuration, differentiating it from the traditional noble gas configuration. Examine examples like tin and indium to illustrate how elements achieve this unique state of stability. Unpack the intriguing intricacies within atomic structures.
Determining Moles of Released Ions in Dissolution Reactions
Want To Learn More? To watch the entire video and ALL of the videos in the series:
When an ionic compound dissolves in water, it undergoes dissociation into its constituent ions. The total moles of ions released is determined by adding up the moles of each ion generated during this dissociation process. In the case of (a) disodium hydrogen phosphate (Na?HPO?), it dissociates into two sodium ions and one hydrogen phosphate ion. For (b) copper(II) sulfate pentahydrate (CuSO? · 5H?O), it dissociates into one copper ion and one sulfate ion. In (c), nickel(II) chloride (NiCl?) diss
Determining Mass Percent Concentration of Solutions
Want To Learn More? To watch the entire video and ALL of the videos in the series:
This instructional video demonstrates the process of calculating the mass percent of various solutions, using the formula "mass of solute divided by mass of solution, all multiplied by 100%." It provides step-by-step calculations for three different solutions, revealing the concentration of each solute in terms of mass percent, offering a practical understanding of quantifying solute proportions in solutions.
H-Cl Bond Energy Explained: ?H Signs Formation & Breakage Dynamics
Want To Learn More? To watch the entire video and ALL of the videos in the series:
Explore the concept of bond energy with the H-Cl bond as a prime example. Delve into the energy dynamics of bond breaking (endothermic positive ?H) versus bond formation (exothermic negative ?H). Understand how the magnitude remains consistent but signs differ based on energy absorption or release.