Molar mass is the weight of one mole of any chemical compounds. How do you calculate molar mass of element (hydrogen)? Molar mass for an element is simply the atomic mass of the element Molar mass of hydrogen = atomic Read More …
If moles have bank accounts, each would have:
6.02 × 10^23 amount of $$$dollars. LOL!
WHAT TYPE OF SOLID SUBLIMES? We all know that ice melts before it evaporates. In sublimation, the liquid phased is omitted.
Dissociation is the breaking down of a compound into elements and the process is usually reversible.
Solvation is simply the process of dissolving .
Jean Antoine Nollet In 1784, a French physicist and clergyman named Jean Antoine Nollet made an interesting discovery. He filled a pig’s bladder with a concentrated solution of alcohol. He then put the bladder in water and the bladder expanded! Read More …
CLOUDY WATER IN A FISH TANK You may be surprised to know that the cloudy water syndrome in a fish tank is caused by colloids. Over a period of time, organic waste produced by the fish and algae in the Read More …
Come to the party, do the zig-zag motion Irregular motion of suspended particles is called “Brownian Motion”. Watch an interesting Youtube video on the discovery of Brownian Motion by British botanist Robert Brown Robert Brown was a Scottish botanist who Read More …
WHAT IS VAPOR PRESSURE? Water always evaporates no matter what the temperature or atmospheric pressure is. Even in the coldest of winter, snow and ice can evaporate by a process called sublimation. They can turn straight into vapor (the gaseous stage) Read More …
Molality is defined as the number of moles of solute per 1 (kg) of solvent. Solute = particles you dissolve Solvent = the liquid you use for dissolving the particles MOLALITY = MOLES OF SOLUTE / MASS OF SOLVENT (KG) EXAMPLE CALCULATION Read More …
Freezing point depression is simply the process of LOWERING the freezing point of a liquid by adding a solute to it. Adding non-volatile substance to volatile substance lowers the temperature for freezing point.
Boiling Point Elevation The RAISING of the normal boiling point of a liquid by adding a non-volatile substance to it. When you add a non-volatile solute to a pure solvent, the boiling point of the liquid solvent is elevated due to the Read More …
VAPOR PRESSURE LOWERING Adding non-volatile solute to volatile solvent lowers the solvent’s vapor pressure. For example, water normally boils at 100ºC (212ºF) but if you add a substance like salt to the solution, it decreases the vapor pressure of the solution. First, recall Read More …
WHAT ARE COLLIGATIVE PROPERTIES OF SOLUTIONS? The characteristics of a solution such as the boiling point, freezing point and vapor pressure are known as colligative properties Colligative properties apply only to solutions and not gas or solids. COLLIGATIVE PROPERTIES ARE Read More …
Nonpolar Molecules have hydrophobic bonds Nonpolar molecules do not contain ions and don’t have dipole movement to form charges. Dipole movement means separation of charges like an atom becoming either positively or negatively charged during a bonding process. Nonpolar molecules Read More …
A nonpolar covalent bond is a chemical bond where electrons are shared equally between two atoms Analogy – like a couple with a joint bank account. NONPOLAR COVALENT BOND The electrons are equally shared There is no charge separation (dipole Read More …
The electrons are unequally shared between two atoms When a chemical bond involves “the sharing of a pair of electrons by two atoms in a molecule”, it is generally called a covalent bond. When the electrons are unequally shared between Read More …
IONIC BONDS An ionic bond is formed by the complete transfer of electrons between atoms. THE IONIC BOND LOVE STORY An ionic bond is formed between elements of drastically different electronegativities, which are typically found between metals and non-metals. Read More …
A QUICK LOOK AT THE THREE DIFFERENT TYPES OF MOLECULAR BONDS HOW DO YOU FIND OUT THE TYPE OF BOND If you’re given two elements, such as carbon and oxygen, how do you tell what type of bond they will Read More …
DEFINITION OF SOLUBILITY The solubility of a substance is the amount of that substance that will dissolve in a given amount of solvent. DIFFERENCE BETWEEN SOLUTE AND SOLVENT SOLUTE – the substance to be dissolved SOLVENT – the liquid for Read More …
Definition The valence electrons are the electrons in the outermost shell or last energy level of an atom. Valence electrons are electrons in the highest principal energy level. They are electrons that sit on the outermost orbit of an element. Read More …
Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons.
Hello and welcome to Sufguppy. Surfguppy provides free online chemistry notes for high school and college students. If you’re a teacher or student, please feel free to use our materials for non-commercial purposes. A small portion of materials on this Read More …
