Mole

Both of these involve reactions with hydrochloric acid and both involve interpretations from a graph, where kinetics is also tested. Question 5 looks at the reaction between CaCO3 and HCl and then determines the identity of M in M(OH)2. Question 6 looks at the reaction between Mg and HCl. Note that 9min30s into the snapkast I wrote the formula CaCl2 where I should have written CaCO3.

One in a series looking at the physical and inorganic questions in GCE Module 2.

In this video lesson, Mr. Scullion demonstrates a reacting mass problem involving volume of oxygen. Try the problem out on your own prior to finding out the solution.

Explaining the mole concept

This Chemistry lesson is titled Whats the difference between a Mole and a Molecule and will give a detailed explanation of the topic.

This Chemistry lesson is titled Converting between Moles Atoms and Molecules Part 2 and will give a detailed explanation of the topic.

Calculating the gram formula mass.

What is it? How do we use it? How do we convert from moles to mass to particles?

To calculate reacting masses you must find out the number of moles of reactant, use the balance chemical equation to find the number of product and lastly by using mass = moles x RMM.