If purple spheres represent iodine atoms, white spheres...

If purple spheres represent iodine atoms, white spheres represent hydrogen atoms, and all the molecules are gases, $(9.2,9.4)$
Reactants
Products
a. write a balanced equation for the reaction.
b. identify the diagram that shows the products.

Key Concepts

Chemical Reaction Diagrams

Visual representations such as diagrams help illustrate how atoms are arranged in molecules and how these arrangements change during a chemical reaction, making it easier to understand the transformation from reactants to products.

Gaseous Phase Reactions

Reactions involving molecules in the gaseous state often require considerations of molecular collisions and volume, and understanding the behavior of gases can provide insight into reaction dynamics and energetics.

Balancing Chemical Equations

This concept involves adjusting the numerical coefficients of reactants and products in a chemical equation so that the number of atoms for each element is equal on both sides, in accordance with the law of conservation of mass.

Transcript

00:01 This question has two parts.

00:01 So the first part is asking us to write down the balanced equation for the reaction.

00:07 So let's take a look at our reactants.

00:10 We have diatomic white molecules.

00:14 These white spheres represent hydrogens.

00:17 Okay, and we have diatonic purple spheres.

00:22 So they represent iodine.

00:24 Let's take a look at our products.

00:28 So essentially across a, b, and c, we see that the products all are just going to be these purple and white spheres.

00:38 So one purple, one white per molecule.

00:40 So it would be h -i.

00:44 And then we see that there's different numbers of them, and then also in product c, we see as well a diatomic iodine.

00:51 But because that same molecule appears in the reactants, we know that it is just simply an excess in that situation.

00:58 So before we can write out the balanced equation, let's kind of deal with these ones right here.

01:03 So how do we write out two h's? well, we'd write it as h2.

01:06 How do we write out two iodines? we'd write it out as i2.

01:14 So how do we write out this balanced equation? well, we simply write down for equation h2 plus i2 produces h -i.

01:29 Now the question is, is this balance? the answer is no, because we have two hydrogens on the left, we only have one on the right.

01:36 So let's put a coefficient of two right in front.

01:40 So now we have two on the left, two on the right...

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