Q1) Refer to the chemical equation of rusting of iron and the image of the iron oxide molecule. 4Fe + 3O2 --> 2Fe O3 Draw a model that shows electron transfer when iron and oxygen chemically react to form rust.
To draw a model that shows electron transfer during the chemical reaction of iron and oxygen to form rust, you'll need to understand the concepts of valence electrons and electron transfer.
Here's a step-by-step guide on how to draw the model:
Step 1: Understand valence electrons
Valence electrons are the outermost electrons of an atom, involved in chemical bonding. For oxygen (O), the valence electron configuration is 2s^2 2p^4, and for iron (Fe), it is 3d^6 4s^2.
Step 2: Identify the reactant atoms
In the chemical equation, 4Fe + 3O2, there are four iron (Fe) atoms and three oxygen (O2) molecules.
Step 3: Draw the iron atoms
Start by drawing four iron atoms. Each iron atom should have four empty slots for valence electrons, as iron readily loses two electrons.
Step 4: Draw the oxygen molecules
Next, draw three oxygen molecules (O2). Each oxygen molecule consists of two oxygen atoms. Each oxygen atom needs to have six empty slots for valence electrons.
Step 5: Electron transfer
In the reaction, iron (Fe) loses two electrons to form Fe2+ ions. Therefore, on each iron atom, place an arrow pointing away, representing the loss of two valence electrons.
Simultaneously, each oxygen atom gains two electrons to form O2- ions. Draw an arrow pointing towards each oxygen atom, indicating the gain of two valence electrons.
Step 6: Ionic bonding
Ionic bonds form between the positively charged Fe2+ ions and negatively charged O2- ions. Connect the arrows from the iron atoms to the oxygen atoms to represent the ionic bonding.
Step 7: Formation of rust
Finally, the four Fe2+ ions and three O2- ions combine in a ratio of 4:3 to form rust, Fe2O3. Combine the ions to form the iron oxide molecule, Fe2O3.
By following these steps, you should be able to draw a model that shows the electron transfer during the chemical reaction of iron and oxygen to form rust.