Percent strength of hydogen per oxide , Different types of concentrate unit. By Raijul Islam

1. Welcome to my presentation
Percent strength of H2O2

2. prepared By
Md. Raijul Islam
Dept. of TextileEngineering
BGMEAuniversity of Fashion& Technology(BUFT)
Session: 2013-2017
Email: raijulbuft@gmail.com

3. Contents
 Introduction
 SolutionTypes
 Concentration units
 Relation
 Percent strength of H2O2
 Primary & Secondary Standard

4. Introduction
Chemistry is a science which deals a lot with solutions and
mixtures. Knowing just how much of one thing is mixed in
with a solution is an important thing to know. Chemists
measure this by determining the concentration of the
solution or mixture.

5. There are three terms that need to be defined in concentration
discussions: solute, solvent and solution.
Solute:The dissolved substance added to the solution.
Solvent:The liquid that dissolves the solute.
Solution:The combination of solute and solvent.

6. Solution

7. Concentration Unit
Molality
Molarity
Normality
 PercentageComposition

8. Molarity
Molarity is the most common concentration unit. It is a measure of the
number of moles of solute in one liter of solution. Molarity measurements
are denoted by the capital letter M with units of moles/Liter.
The formula for molarity (M) is
M =
𝒎𝒐𝒍𝒆𝒔(𝒔𝒐𝒍𝒖𝒕𝒆)
𝑳𝒊𝒕𝒆𝒓𝒔(𝒔𝒐𝒍𝒖𝒕𝒊𝒐𝒏)
1 M solution will have one mole of solute per liter of solution. 100 mL will
have 0.1 moles,
 2L will have ????? moles, etc.

9. Molality is another commonly used concentration unit. Unlike
molarity, molality is interested in the solvent used to make the
solution.
Molality is a measure of the number of moles of solute dissolved per
kilogram of solvent.This unit is denoted by the lower case letter m.
The formula for molality (m) is
Molality

10. Normality
Normality is a concentration unit seen more often in acid-base and
electrochemistry solutions. It is denoted by the capital letter N with
units of moles/L. Normality is more concerned with the chemically
active part of the solution.
This number is used to calculate the normality of a solution using the
formula

11. Molarity Molality Normality
Expressed by mol/L Expressed by mol/kg Mol/L
Depends on
Temperature
Does not depend on
temperature
Depnds on
temperature
Depends on volume Depends on weight Depends on
substitution ion and
volume

12. Concentration in Percent Composition of Solution
Percent composition is the percentage by mass of each
solute in a solution. We can calculate concentration in
percentage by three ways
 w/w%
 w/v%
 v/v%

13. Concentration in Percent of H2O2
This is the weight of H2O2 per unit volume. This is more commonly used in
our country.
Generally 35% H2O2 and 50% H2O2 used in textile sector in our country.
But 50% H2O2 is most widely used. If 50 gm H2O2 is present in 100cc
solution, then it will be called 50% H2O2.

14. Standard Substance
Standards are the material containing precisely known concentration of
substance for use in quantitative analysis.
Primary standard Substance
Secondary standard Substance

15. • Primary Standard: Primary standard is typically reagent which can be
weighed easily and which is pure that its weight is truly representative of the
number of moles of substance combined. Its concentration does not change
with climate.
• Secondary Standard: Secondary standard is a standard that is prepared
in laboratory for a specific analysis. It is usually standardized against a
primary standard.