Concentration Terms in Physical Chemistry
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- Concentration Terms which often appear in Physical Chemistry
- Mole concept, Mole fraction
- Mass %, Volume %, Mass/Volume %
- ppm, ppb & ppt
- Molarity, Molallity
- Equivalent mass, Equivalents & Normality
- Numerical problems on all concentration terms
- Basics of chemistry
- An idea of what is an Atom, Molecule, Solute, Solvent, Solution etc
Concentration is a very common concept used in chemistry and related fields. It is the measure of how much of a given substance is mixed with another substance. This can apply to any sort of chemical mixture, but most frequently is used in relation to solutions, where it refers to the amount of solute dissolved in a solvent.
Qualitatively, solutions of relatively low concentration are described as “dilute,” or “weak,” while solutions of relatively high concentration are described as “concentrated,” or “strong.”
Quantitative notation of concentration is far more informative and useful from a scientific point of view. There are a number of different ways to quantitatively express concentration; the most common are discussed in this course.
The choice of a particular concentration term depends on many factors like convenience, experimental limitations etc.
- Secondary School students
- IIT JEE Aspirants (India)
- XI & XII students
An introduction about how learning this course makes sense is explained.
Hoping to see students appreciate learning this course after this lecture.
Mole concept is an important concept in Chemistry. Having clarity in this concept enables us to understand higher level concepts better.
This lecture discusses the mole concept in detail with examples and numerical problems. Explanations are given in a simplistic manner so that even a high school student can catch it easily.
After the lecture student will be better equipped to solve mole concept related numerical problems.
Mass %, Volume % & Mass/Volume % are 3 types of concentration terms used to express how much of a particular substance is present in the mixture. Usage of the concentration terms can be seen in most of the things we use in our day to day life like hand sanitizer, tablets, vinegar, shampoo etc.
This lecture takes you through these concentration terms in detail with the help of a numerical problem.
ppm, ppb and ppt is another set of concentration terms widely used to express that component of the mixture which is present in very low quantity. Example; fluoride, lead content of water. Metal content in the human body etc
Lecture takes you through the clear explanation of above concentration terms
'Molality' is the concentration term often used in colligative properties (elevation in boiling point, depression in freezing point, lowering of vapor pressure) related experiments where it involves a temperature change.
Lecture takes you through the clear explanation of this concentration term.
'Molarity' is the famous concentration term used in titration-lab and osmotic pressure related experiments.
There exists a slight difference between molality and molarity and the lecture concentrates on giving clarity on this line.
Along with molarity and molality, normality is also used a lot in chemistry labs. This particular concentration term is very helpful when we need to back calculate in an experiment.
Lecture explains equivalent mass, equivalents and normality in comparison to molar mass, mole and molarity.