Video Transcript

What is the molecular formula of the compound created when lithium reacts through oxygen gas?

This question is asking us for the molecular formula for the product that the reaction between lithium and also oxygen. As you may currently know, this reaction the lithium, an alkali metal, with oxygen in the wait occurs very quickly. For example, a piece of lithium metal, once cut, will tarnish really quickly, as soon as in contact with air. This is as a an outcome of that reaction v the oxygen in the air. Girlfriend will find alkali metals, choose lithium, being stored under oil. This is in bespeak to stop its reaction v both the oxygen in the air and also any water, because the reaction between lithium and water is really violent.

We’re given the two reactants in this case, lithium and oxygen. Therefore the product need to be a result of combine lithium and also oxygen atoms in some way. Now we simply need to work out how many lithium atoms and how numerous oxygen atom in every molecule. Let’s start by looking in ~ the oxidation states of both lithium and also oxygen. Lithium is one alkali steel in group one the the regular table. It develops a to add one oxidation state.

Oxygen is in group 16 ~ above the right-hand side of the regular table and also most frequently forms a minus two oxidation state. We desire our resulting compound to be neutral overall. So every one of the dues on both the lithium and also the oxygen must include up with each other to provide us zero. If our molecular formula to be one lithium and also one oxygen atom, we would not have actually a neutral compound. As we have the right to see, we require two lithium atom to balance out the 2 minus fee on the one oxygen atom. Therefore the molecule formula for our last compound is Li₂O, 2 lithium atom to one oxygen atom.

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And also this is the formula for lithium oxide.

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Chemistry Atoms room the Smallest form of aspects elements Make up the regular Table The periodic Table Is a Map that the aspects elements Combine to form Compounds chemical Bonds host Compounds with each other Substances’ Properties count on their Bonds chemistry Reactions alter Arrangements of atom The Masses that Reactants and also Products space Equal chemistry Reactions involve Energy alters Life and also Industry depend on chemistry Reactions A solution Is a kind of Mixture The amount of Solute the Dissolves have the right to Vary Solutions can Be Acidic, Basic, or Neutral steel Alloys space Solid mixture Carbon-Based Molecules are in many Materials