How to recognize intermolecular forces?

Intermolecular forces are forces of attraction between molecules. These forces influence properties of substances such as boiling and melting points, phases at room temperature, viscosity and many more. Intermolecular forces can be divided into 4 major categories: 1. ION-ION This is the strongest intermolecular force. It is present in all ionic compounds. To recognize it, look at the formula and see if it has metal with a nonmetal, or metal with polyatomic ion. 2. HYDROGEN BONDING Even though there is a word bonding in its name, it is still a force and not a bond. Hydrogen bonding is present in molecules that have OH, NH or FH. It is the strongest type of dipole-dipole force, and is usually

How to best prepare for chemistry finals?

It's almost december and that means it's finals time! This can be very overwhelming and stressful. At Transformation Tutoring, we came up with tips on how to best prepare for your chemistry finals. 1. Make a to-do list. List items in terms of priority. Since time is limited, it is important to focus on the most important tasks that need to be done. Make a big plan for the two upcoming weeks with major milestones (for example, review chapter 3 by Monday). Also make a todo list for every day. 2. Practice old tests, and classwork problems. This should be the most important part of the to do list. If your teacher gives you any past exams, these should be the guides into what you have to practic

Which of the following substrates would react most efficiently in a substitution reaction with NaCN?

Which of the following substrates would react most efficiently in a substitution reaction with sodium cyanide (NaCN)? (A) 1-iodohexane (B) 1-fluorohexane (C) (R)-2-bromohexane (D) chlorocyclohexane (E) 1-bromo-1-methylcyclohexane Answer: (A) 1-iodohexaneA Solution: We first must figure out which reaction does the question ask about. The question mentions substitution reaction, thus either SN1 or SN2. We are also given NaCN as the nucleophile. We need to remember that SN1 prefers neutral, weak nucleophiles while SN2 prefers strong, often negatively charged nucleophiles. NaCN is an ionic compound, which we can rewrite as Na+ and CN-. CN- is a strong nucleophile (it has a negative charge).