Chemistry
What is Diluting Solutions?
Often, in analytical work, it is necessary to know how to prepare a more dilute solution from a more concentrated one. This process is called…
Chemical Equations
Chemistry
Common units of Concentration
Chemists use grams per cubic decimetre. Remember that 1000 cubic centimetres (cm3) equals 1 cubic decimetre (dm3) also equals 1 litre (L). We note that…
Chemistry
Define Solutions and Concentrations in terms of Chemistry
A Solution is a homogeneous mixture of two (or more) pure substances and typically consists of a solvent (the “dissolver”) which is generally present in…
Chemistry
What is Isotopes?
Many elements have more than one type of atom. These atoms have the same number of protons but different numbers of neutrons. Atoms having different…
Chemistry
Fundamental Subatomic Particles
Electrons are only found outside the nucleus. We can say that the electron has a negligible mass because it is —2000 times less heavy than…
Chemistry
What is Atomic Structure?
An atom was once thought to be the smallest part of something that could exist. In 1897, JJ Thompson discovered that by applying high voltage…
Chemistry
Balancing Chemical Equations
Write the correct formula for the reactants and products; reactants on left of arrow, products on right. Choose the most complicated compound that contains the…
Chemistry
Chemical Equation
A chemical equation is a shorthand description of the changes that occur in a chemical reaction such as Methane + Oxygen → Carbon Dioxide +…
Chemistry
Differences between Empirical Formula and Molecular Formula
Molecular formulas tell you how many atoms of each constituent are in a compound, and empirical formulas tell you the simplest or most summary ratio…
Chemistry
Methods of Balancing Chemical Equations
Balancing by inspection: Consider the example: We notice that there are 2 nitrogens on both the left and right sides, so nitrogen is already balanced.…