Deciding whether a precipitate will form
We can cause a sparingly soluble salt to precipitate out of solution if the product of the concentration of the
Category: Calculations
What is the common ion effect?
Silver chloride is a sparingly soluble salt. AgCl(s) ⇌ Ag+(aq) + Cl–(aq) Ksp = [Ag+(aq)] [Cl–(aq)] = 2.0 x 10-10
What is the solubility product?
Many ionic compounds are sparingly soluble – a good example is barium sulphate which has a solubility of 1.05 x
Calculating Kp, the equilibrium constant, for a gaseous system.
For reversible reactions taking place in the gaseous phase it is more straightforward to think in terms of pressure rather
Continue readingCalculating Kp, the equilibrium constant, for a gaseous system.
How to find the equilibrium constant and equilibrium concentrations for a reaction
Now it is time to introduce the concept of the equilibrium constant, Kc. Kc is basically a ratio – the
Continue readingHow to find the equilibrium constant and equilibrium concentrations for a reaction
CFCs and the ozone layer
The chemistry that underlies the depletion of ozone in the stratosphere by chlorofluorocarbon molecules is really interesting – an application
How to calculate the relative abundance of an isotope
We can calculate the percentage abundances for each of the isotopes in an element if we know the mass number
Continue readingHow to calculate the relative abundance of an isotope
How to calculate the relative atomic mass of an element from a mass spectrum
We know that relative atomic mass (Ar) is the average of (% abundance of an isotope x isotopic mass) for
Continue readingHow to calculate the relative atomic mass of an element from a mass spectrum
Time of flight mass spectrometer
A mass spectrometer is able to very accurately determine the relative atomic mass of an element, by measuring the mass
Using the Nernst equation to calculate the electrode potential of a half cell
The standard electrode potential for a half cell means exactly that – everything happening under standard conditions (298K, 100 kPa,
Continue readingUsing the Nernst equation to calculate the electrode potential of a half cell