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Intermediate Equations

Assorted Equations

Hydrogen

Carbon Monoxide

Carbon Dioxide

Nitrogen

Oxygen

Practise balancing equations:

Direction:

In the following equations you will see a blank box before the symbol of each compound and element. Enter the lowest possible number in each box, or leave the box blank if you think the chemical needn't have a number (i.e. the number is equivalent to '1').
When you think the equation is balanced, click on the small button "Check answer" that appears below it.
If your equation is incorrect, then click the button "Reset" and try balancing the equation again.
In case you are in a hurry or are unable to balance, then click the button "Show answer."
If you want to know the time taken (minutes:seconds) to balance a chemical equation, you click the "Start" button and after balancing the equation, click the "Stop"button. Once, you have noted the time, click the "Reset Timer" button.

Note:

If you get no response after clicking 'Check answer' or 'Show answer', your browser has disabled to run this program. Enable it by clicking below the 'address bar' and follow the instructions.

Preparation of Oxygen(Laboratory Methods):

1.In the presence of Manganese(IV) oxide(catalyst), Hydrogen peroxide decomposes faster into water and Oxygen:

H₂ O₂ → H₂ O + O₂

Time Taken:00:00

2.In the presence of Manganese(IV) oxide(catalyst), Potassium chlorate decomposes faster into Potassium chloride and Oxygen:

KClO₃ → KCl + O₂

Time Taken:00:00

3.Sodium peroxide reacts with water to form Sodium hydroxide and Oxygen:

Na₂ O₂ + H₂ O → NaOH+ O₂

Time Taken:00:00

Preparation of Oxygen(Other methods):

1.When chocolate brown Lead(IV) oxide is heated strongly, it decomposes into yellow Lead(II) oxide powder and Oxygen gas:

PbO₂ → PbO + O₂

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2.When orange-red Lead(II,IV) oxide(Tri Lead tetroxide) is heated strongly, it decomposes into yellow lead(II) oxide powder and Oxygen gas:

Pb₃ O₄ → PbO + O₂

Time Taken:00:00

3.When red Mercury(II) oxide is heated strongly, it decomposes into Mercury and Oxygen gas:

HgO → Hg + O₂

Time Taken:00:00

4.When brown Silver oxide is heated strongly, it decomposes into Silver and Oxygen gas:

Ag₂ O → Ag + O₂

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5.When Potassium permanganate is heated, it decomposes into Potassium manganate, Manganese(IV) oxide and Oxygen gas:

KMnO₄ → K₂ MnO₄ + MnO₂ + O₂

Time Taken:00:00

Reactions of Oxygen:

With Non-metals:

1.A mixture of Hydrogen and Oxygen, when ignited, burns with a 'pop' sound to form water:

H₂ + O₂ → H₂ O

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2.Carbon , when ignited,burns in excess Oxygen to form Carbon dioxide:

C + O₂ → CO₂

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3.In limited amount of air Carbon , when ignited,forms Carbon monoxide:

C + O₂ → CO

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4. At 3000^o C or during lightning discharge, Nitrogen reacts with Oxygen to form Nirogen monoxide(Nitric oxide):

N₂ + O₂ → NO

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5.Phosphorous, when ignited,burns in Oxygen to form white fumes of Phosphorous pentoxide:

P + O₂ → P₂ O₅

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6.Sulphur , when ignited,burns in Oxygen with a blue flame to form colourless and pungent smelling Sulphur dioxide gas:

S + O₂ → SO₂

Time Taken:00:00

With Metals:

1.Potassium metal, when ignited, burns in oxygen with a lilac flame to form a mixture of Potassium oxide and Potassium superoxide:

K + O₂ → K₂ O

Time Taken:00:00

K + O₂ → KO₂

Time Taken:00:00

2.Sodium metal, when ignited, burns in oxygen with a yellow flame to form a mixture of Sodium oxide and Sodium peroxide:

Na + O₂ → Na₂ O

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Na + O₂ → Na₂ O₂

Time Taken:00:00

3.Calcium metal, when ignited, burns in oxygen with a brick red flame to form white Calcium oxide powder:

Ca + O₂ → CaO

Time Taken:00:00

4.Magnesium metal, when ignited, burns in oxygen with a dazzling flame to form white Magnesium oxide powder:

Mg + O₂ → MgO

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5.Heated Aluminium metal reacts with oxygen to form white Aluminium oxide powder:

Al + O₂ → Al₂ O₃

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6.Heated Zinc metal reacts with oxygen to form Zinc oxide powder which is yellow when hot and white when cold:

Zn + O₂ → ZnO

Time Taken:00:00

7.Heated Iron metal reacts with oxygen to form bluish black Iron(II,III) oxide(Tri Iron tetroxide):

Fe + O₂ → Fe₃ O₄

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8.Heated Lead metal reacts with oxygen to form Lead(II) oxide powder which is orange when hot and yellow when cold:

Pb + O₂ → PbO

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9.Heated Copper metal reacts with oxygen to form black Copper(II) oxide powder:

Cu + O₂ → CuO

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10.Heated Mercury metal reacts with oxygen to form red Mercury(II) oxide powder:

Hg + O₂ → HgO

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With Compounds:

1.Carbon monoxide gas burns in Oxygen with a blue flame to form carbon dioxide gas:

CO + O₂ → CO₂

Time Taken:00:00

2.Nitrogen monoxide gas reacts with Oxygen to form reddish brown Nitrogen dioxide gas:

NO + O₂ → NO₂

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3. In the presence of Vanadium pentoxide(catalyst) at about 450^o C,Sulphur dioxide gas reacts with Oxygen to form Sulphur trioxide:

SO₂ + O₂ → SO₃

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4.When strongly heated in air, Zinc sulphide reacts with Oxygen to form Zinc oxide and Sulphur dioxide gas:

ZnS + O₂ → ZnO + SO₂

Time Taken:00:00

5.When strongly heated in air, Lead(II) sulphide reacts with Oxygen to form Lead(II) oxide and Sulphur dioxide gas:

PbS + O₂ → PbO + SO₂

Time Taken:00:00

6.When ignited, Methane burns in Oxygen to form Carbon dioxide and water:

CH₄ + O₂ → CO₂ + H₂ O

Time Taken:00:00

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Intermediate Equations

Assorted Equations

Hydrogen

Carbon Monoxide

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Oxygen

Practise balancing equations:

Direction:

Note:

Preparation of Oxygen(Laboratory Methods):

Preparation of Oxygen(Other methods):

Reactions of Oxygen:

With Non-metals:

With Metals:

With Compounds: