
Kat introduces a quantitative gcse igcc chemistry course and explains concepts like relative atomic mass, mass percentage, conservation of mass, gas volume, limiting reactant, concentration, atom economy, and percentage yield.
Explore the basics of the periodic table, atoms, and subatomic particles. Identify protons, neutrons, and electrons, the nucleus, and electron shells; apply atomic number and mass number to find neutrons.
Calculate the relative formula mass by summing the relative atomic masses of atoms in a compound, using the periodic table and subscripts; practice includes Li2SO4, CO2, Ca(OH)2, Mg(NO3)2, and propane.
Learn to calculate the percentage by mass of an element in a compound using the formula, with examples like sodium carbonate, copper sulfate, aluminium sulfate, and sodium sulfate.
Explore how moles link to Avogadro's number and mass, use the mole triangle to convert between mass, moles, and molar mass, and count particles.
Learn the law of conservation of mass: atoms are not created or destroyed, and the total mass of reactants equals the total mass of products.
Identify the limiting reactant by calculating moles from given masses and comparing them using molar mass, with calcium oxide, water, magnesium, bromine, aluminium, and chlorine as examples.
Practice calculating masses from reacting masses by building a mass-mole ratio table, using molar masses from the periodic table, and applying the mass-mole triangle to convert between reactants and products.
Identify the empirical formula as the simplest whole-number ratio of atoms, and relate it to the molecular formula. Apply common-factor division to move between formulas, with examples like dopamine.
Identify the empirical formula by converting mass percentages to moles, dividing by the smallest factor, and scaling to whole-number ratios using the provided table.
Explain gas volume at temperature and pressure using V = n×24 dm³ and n = V/24, with cm³ to dm³ conversion; for 60 dm³ O₂, you get 120 dm³ CO₂.
Learn how concentration quantifies how many particles occupy a volume, using mol/dm^3 and g/dm^3, and how to convert volumes and apply the concentration triangles through practical examples.
Master concentration calculations with a magic table linking volume, concentration and moles in acid-base reactions. Convert volumes to dm3 and apply reaction ratios to find concentrations or volumes.
Explore atom economy in gcse igcse chemistry (quantitative): define atom economy, compute it from reactants to the desired product, and practice with hydrogen gas and calcium oxide examples.
Explore percentage yield as the ratio of actual to theoretical yield, using a cat food analogy and chemical examples to calculate yields and explain practical losses.
Create a compact, one-page formula sheet covering relative atomic mass, percentage by mass, relative formula mass, percentage yield, empirical formula, gas laws, and concentration and mole calculations for quantitative chemistry.
examine exam-style quantitative chemistry problems, calculating percent by mass, empirical formulas, and mole ratios using mass–moles conversions across reactions, displacement, and ammonia production questions.
Hello, Welcome to my quantitative chemistry GCSE/IGCSE course.
My name is Kat, and I completed my degree in Biochemistry at Imperial College London. After my degree, I have been both a scientist and a tutor. Teaching has always been my passion, I have 7 years of tutoring experience as of now, I have helped many students achieved A*/ 9 in GCSE/iGCSE chemistry.
The reason I want to make this course is that I found a lot of my students struggle with quantitative chemistry at this level, which hinders them from achieving the top grades. Over the years I have developed ways to train my students to be good at this topic and in chemistry overall, and I cannot wait to share my knowledge with you.
I love using analogy to make complex concepts simple. I understand that no one loves memorising a lot of things, so my job is to minimise the things that you have to memorise and really enhance your understanding of the topics.
In this course we will go over the following concepts:
These will be on screen:
Relative Atomic Mass (Ar)
Relative Formula Mass (Mr)
Moles
Percentage mass of an element in a compound
Conservation of mass
Gases volume
Limiting reactant
Reacting masses Equations
Concentration
Atom Economy
Percentage Yield
For each topic, I will go through the concepts and feed you with a lot of questions with various difficulty level and of course explain the answers to ensure that you fully grasp the concept.
At the end of the course, I have also compiled some exam questions, so you guys can get familiarised with them!
If you are struggling with concepts such as moles or percentage yield anything like that
Or if you would like a refresher on the quantitative part of iGCSE/GCSE chemistry, this course will be for you.
I cannot wait to teach you all the little tricks to help you achieve the best that you can!
Thanks so much for joining me, and I do hope that you will click the enrol button and hope to see you in the course.
If you have any questions, feel free to message me and I will get back to you as soon as possible. Thank you.