IGCSE CHEMISTRY-EXTRACTION OF METALS

IGCSE CHEMISTRY-EXTRACTION OF METALS

metal extraction   12:32

 IGCSE CHEMISTRY-EXTRACTION OF  METALS

 

 

Atomic Structure and Electrons in Atoms - AS Level Chemistry

Atomic Structure and Electrons in Atoms - AS Level Chemistry

nuclear atom   08:29

 Atomic Structure and Electrons in Atoms - AS Level Chemistry Presentation

 

 

Answer Key_Simulation Test

Answer Key_Simulation Test

igcse exam   14:04

 

To download the question paper: here

Chemical Energetics-Simulation Test

Chemical Energetics-Simulation Test

igcse exam   14:00

 

 

The answer key is here

(HANDOUT) IGCSE Chemistry-Redox Reactions

(HANDOUT) IGCSE Chemistry-Redox Reactions

reduction   13:53

REDOX REACTIONS

• Redox stands for reduction oxidation.
• Redox reaction, also called oxidation reduction reaction, is a chemical reaction in which one substance is reduced and another is oxidised simultaneously.
• Oxidation and reduction of substances occur simultaneously. As one substance is reduced the other is oxidised.
• An oxidising agent is a substance that causes the oxidation of the other substance. Therefore, the substance that is reduced in a reaction is the oxidising agent.
• A reducing agent is a substance that causes the reduction of the other substance. For example, the substance that is oxidised in a reaction is the reducing agent.

OXYGEN IN REDOX REACTION

• Oxidation is the gain of oxygen by the substance. A substance that has gained oxygen is said to be oxidised.
• Reduction is the loss of oxygen by the substance. A substance that has lost oxygen is said to be reduced.

HYDROGEN IN REDOX REACTION

• Oxidation is the loss of hydrogen by the substance. A substance that has lost hydrogen is said to be oxidised.
• Reduction is the gain of hydrogen by the substance. A substance that has gained hydrogen is said to be reduced.

ELECTRONS IN REDOX

• Oxidation is the loss of electrons. A substance that loses electrons is oxidised.
• Reduction is the gain of electrons. A substance that gains electrons is reduced.
• The reaction below shows a redox reaction involving the gain and loss of electrons. 

OXIDATION NUMBER

• Oxidation number, also called oxidation state, is the number of electrons an atom gains or losses in a chemical combination. 

 

REDOX REACTION PRESENTATION

REDOX REACTION PRESENTATION

reduction   13:44

 REDOX REACTIONS

• Redox stands for reduction oxidation.
• Redox reaction, also called oxidation reduction reaction, is a chemical reaction in which one substance is reduced and another is oxidised simultaneously.
• Oxidation and reduction of substances occur simultaneously. As one substance is reduced the other is oxidised.
• An oxidising agent is a substance that causes the oxidation of the other substance. Therefore, the substance that is reduced in a reaction is the oxidising agent.
• A reducing agent is a substance that causes the reduction of the other substance. For example, the substance that is oxidised in a reaction is the reducing agent.  

ELECTROMAGNETIC FORCES AND ELECTROMAGNETIC INDUCTION

ELECTROMAGNETIC FORCES AND ELECTROMAGNETIC INDUCTION

IGCSE Physics   21:07

ELECTROMAGNETIC FORCES AND ELECTROMAGNETIC INDUCTION

 

IGCSE PHYSICS-MAGNETISM AND ELECTROMAGNET

IGCSE PHYSICS-MAGNETISM AND ELECTROMAGNET

magnetism   20:58

 

IGCSE PHYSICS - MAGNETISM