Story Board-Chemical properties of oxygen gas-Vagdevi
Storyboard Text
- Excuse me mam, what are chemical properties of oxygen gas?
- Children, today we are leaning about chemical properties of oxygen gas.
- Thank you Mam!
- Thank you Mam!
- Okay class, for today your class endsThank you!Have a great day!
- Thank you Mam!
- Thank you Mam!
- Wow! Mam this sounds interesting.
- 1.combustibility2.action with litmus3. action with carbon4.action with sulphur5.action with phosphorus6.action with sodium7.action with potassium8.action with calcium9.action with magnesium
- 6.Action with sodium- When burning sodium is taken into the cylinder of oxygen, it burns with a brilliant golden yellow flame to form sodium oxide.4Na + O2 ---->2Na2ONa2 + H2O---->2NaOH
- 1. Combustibility-Oxygen is an incombustible gas, it does not catch fire. However, it is a supporter of combustion. A glowing wooden splinter bursts into flame when taken in a jar of oxygen.
- Oh!
- 2. Oxygen does not affect moist blue litmus and red litmus paper. Hence, it is neither acidic nor basic in character. It is neural in character.
- 3.Action with carbon- When red hot carbon ( a piece of glowing charcoal) is taken into the cylinder of oxygen, it burns brightly producingsparkles and a crackling sound. It forms colourless gas known as carbon dioxideC + O2----->CO2CO2 + H2O----> H2CO3Ca(OH) + CO2---> CaCO3 + H2O
- 7. Action with Potassium-Potassium burns in air to form sodium oxide dissolving in water form potassium hydroxide.4K + O2---->2K2OK2O + H2O---->2KOH
- 5.Action with phosphorus- When gently heated, phosphorus is taken into the cylinder of oxygen, it burns with dazzling white flame producing dense white fumes of phosphorus pentoxide.4P + 5O2---->2P2O5P2O5 + 3H2O--->2H3PO4
- 8.Action with calcium- Calcium burns air to form calcium oxide which on dissolving in water forms calcium hydroxide.2Ca + O2--->2CaOCaO + H2O---->Ca(OH)
- MgO + H2O---->Mg(OH)22Mg + O2--->2MgO9.Action with magnesium-When burning magnesium is taken into the cylinder of oxygen, it burns with a dazzling white flame to form magnesium oxide.
- 9.Action with magneesium-When burning magnesium is taken into the cylinder of oxygen, it burns with a dazzling white flame to form magnesium oxide.2Mg + O2---> 2MgOMgO + H2O---->Mg(OH)2
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