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12 Class Chapter 3- Electrochemistry

ELECTROCHEMISTRY Electrolysis:                     It is the process of decomposition of an electrolyte by the passage of electricity through its aqueous solution or molten state. Faraday’s first law of electrolysis:                                                         In a chemical reaction, the amount of any substance deposited or liberated is directly proportional to the quantity of electricity passed through it.                                     W …

12 Class Chapter 2- Solution

SOLUTION                                                           Solution:–                 A solution is homogeneous mixture of two or more chemically non-reacting substances, whose composition can be varied within certain limits. Expressing concentration of solutions 1.      Percentage:- =>  mass percentage (%) of a component  (W/W)                   = Mass of the component in solution*100 / Total mass of the solution =>  volume percentage …

12 Class Chapter 1- Solid State

Solid State Chemistry Solid: –          Matter which posses rigidity having definite shape &volume is called solid. Types of solid:- 1.      Crystalline Solid :- Eg:- Metals And Non metals 2.      Amorphous Solid :- Eg:- Rubber ,Glass ,Plastic Difference and Comparison between of characteristics Crystalline Solid: –                             Contain regular arrangement having short …

11 Class Chapter 2- Structure of Atom

Atomic  Theory of matter:-                                             According to this theory , atom is the ultimate particle of matter , also known as Dalton’s  Atomic theory (1808). Cathode ray discharge tube experiments: –  1.     Cathode rays start from cathode and move toward anode. 2.     These rays are not visible but there behaviour can be observed with fluorescent …

11 Class Chapter 1- Some Basic Concept of Chemistry

Some Basic Concept Of Chemistry Some Basic Concept Of Chemistry   Basic constituents of matter:- Atoms and molecules. What is chemistry:- It is the branch of science which deals with the study of composition, properties and interaction of matter. Matter:- Anything which has mass and occupies space known as matter. Ex:- Water, pencil, pen, book …

Symbol used in chemistry and Formula used in chemistry

Symbol used in chemistry d= densityv= volumem= massCp= specific heatq= heatΔT= change in temperature K= KelvinC= Celsius Formula used in chemistry d=m/vv=m/dm=v*dCp= q/ (m* ΔT)q= Cp*m*ΔTΔT= q/Cp*mm= q/Cp* ΔTTf= q/m*Cp +TiTi= q/m*Cp +Tf (then divide everything on the right by negative 1 [-1]) **this formula isn’t used as often as Tf** t(C°)= T(K) – 273.15K  …

Atoms and Moles

Section 1 Substances are Made of Atoms I. Atomic Theory -As early as 400 B.C., an atomic theory existed that stated that atoms are the building blocks of all matter-Democritus was the first scientist who believed in atoms (Greek)-It wasn’t until the 1800s that atomic theory was revised based on scientific observations  A. Law of …

Some Notes & Terms to remember about Chemistry

Section 1 of Chemistry Notes Info. Working with the Properties & Changes of Matter Chemical- any substance that has defined composition Everything you see is made up of chemicals Even things you cannot see are made up of chemicals Some exist naturally Some are manufactured Chemical Reaction- the process by which one or more substances …

Chemistry Terms

Chemistry Terms at Chemistry Notes Info Chemical-any substance that has a defined composition Chemical reaction– the process by which one or more substances change to produce one or more different substances States of matter-the physical forms of matters, which are solid, liquid, gas, and plasma   Reactant– a substance or molecule that participates in a …