There are many Chemistry courses out there and the important thing is knowing how to choose the right one that works best for you. Mr Donnel Koh has helped thousands of students excel in their Secondary, IB and JC Chemistry exams and we have created online courses for easier reference and more intensive learning.
Solubility equilibrium is a type of dynamic equilibrium that exists when a chemical compound in the solid state is in chemical equilibrium with a solution of that compound. Th...
Alkanes are organic compounds that consist of single-bonded carbon and hydrogen atoms. The formula for Alkanes is CnH2n+2, subdivided into three groups – chain alkanes, cycl...
Arenes are aromatic hydrocarbons. The term "aromatic" originally referred to their pleasant smells (e.g., from cinnamon bark, wintergreen leaves, vanilla beans and anise seeds...
Atomic structure refers to the structure of an atom comprising a nucleus (centre) in which the protons (positively charged) and neutrons (neutral) are prese...
In organic chemistry, a carbonyl group is a functional group composed of a carbon atom double-bonded to an oxygen atom: C=O. It is common to several classes of organic compoun...
Carboxylic Acid is an organic compound containing a carboxyl functional group. They occur widely in nature and are also synthetically manufactured by humans. Upon deprotonatio...
Chemical bonding is the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of...
The study of chemical energetics deals with the energy changes during a chemical reaction. During chemical reactions, energy is either released or absorbed. Chemical energetic...
In a chemical reaction, chemical equilibrium is the state in which both the reactants and products are present in concentrations which have no further tendency to change with ...
An electrochemical cell is a device that can generate electrical energy from the chemical reactions occurring in it, or use the electrical energy supplied to it to facilitate ...
(l) state the relationship, F = Le, between the Faraday constant, the Avogadro constant and the charge on the electron
(m) predict the identity of the substance ...
(g) explain and use the term entropy
(h) discuss the effects on the entropy of a chemical system by the following:
(i) change in temper...
The term “halogen derivatives” refer to the organic compounds of halogens which usually contain covalently-bonded halogens. The electronegativity of elements plays a cruci...
A hydroxy or hydroxyl group is a functional group composed of one oxygen atom covalently bonded to one hydrogen atom and having the chemical formula OH. Compounds such as alco...
Content
• Empirical, molecular and structural formulae
Nitrogen compounds such as urea, amine and guanidine are used to denature proteins, hence their antimicrobial properties. One special form of nitrogen compounds for antimicrob...
Chemical kinetics, also known as reaction kinetics, is the branch of physical chemistry that is concerned with understanding the rates of chemical reactions. It is to be contr...
Stoichiometry of redox reactions means calculations of the quantities of the oxidizing and reducing agents and their products in oxidation reduction reactions. Redox, on the o...
The gaseous state of matter occurs between the liquid and plasma states, the latter of which provides the upper temperature boundary for gases. Bounding the lower end of the t...
The periodic table, also known as the periodic table of the (chemical) elements, is a rows and columns arrangement of the chemical elements. It is widely used in chemistry, ph...