Write all of the mole-mole factors for each of the following equations: a. 2 Al(s)+3 Cl2(g) ⟶2 A

Write all of the mole-mole factors for each of the following...

Key Concepts

Balanced Chemical Equations

A balanced chemical equation represents the chemical reaction where the number of atoms for each element is conserved across the reactants and products. This balance is achieved by adjusting the coefficients, which indicate the relative number of moles of each substance involved in the reaction.

Stoichiometric Coefficients

These are the numerical values placed before compounds in a balanced equation. They indicate the proportions of moles of reactants and products, and are essential for determining the mole-to-mole conversion factors used in quantitative chemical calculations.

Mole-to-Mole Conversion Factors

Mole-to-mole conversion factors are ratios derived directly from the coefficients of a balanced chemical equation. They allow one to convert the amount in moles of one substance to the equivalent number of moles of another substance participating in the reaction, ensuring the quantitative balance of the reaction.

Stoichiometry

Stoichiometry is the branch of chemistry that deals with the quantitative relationships between the reactants and products in a chemical reaction. It uses the mole concept and the mole-to-mole ratios from balanced equations to calculate the amounts of substances consumed and produced in a reaction.

Transcript

00:01 Okay, so this question is asking us about mole -mole factors for chemical reactions or equations.

00:08 Just a reminder, a mole -mol factor is a conversion factor or a ratio between the number of moles of any compounds, any two compounds in a chemical reaction.

00:18 You need to make sure that your chemical reaction is balanced before you try to write down or figure out your mole -mol factors.

00:24 So they give us two chemical equations here.

00:28 We have our first one is labeled a, and we have aluminum solid with looks like chlorine gas, and that's forming aluminum chloride, which is a -l -c -l -3.

00:54 Like i said, this reaction is balanced.

00:56 So to find our mole -factors, we need to look at the coefficients, which are in front of these molecules.

01:03 That is the number of moles needed to make this a balanced equation.

01:07 And so now we're just going to find the ratio between them.

01:09 It's very simple.

01:10 We need to pair up the molecules.

01:12 And so we're going to see that two moles of aluminum corresponds or to make equal, we need three moles of chlorine for this reaction.

01:26 And i just grabbed those numbers right from the equation that was provided.

01:30 And since this is a conversion factor, it is a ratio.

01:33 You can go ahead and flip it.

01:34 So two over three moles of aluminum to chloride or chlorine glass, you can just flip it.

01:41 And three moles of chlorine is this, it goes to two moles of aluminum.

01:50 So very simple.

01:51 So these two are paired up.

01:52 We need to pair up every single molecule in this reaction.

01:57 So we've already done aluminum and chlorine.

01:58 So let's go with aluminum and aluminum chloride now.

02:01 So two moles of aluminum.

02:05 And we see that it goes with two moles of aluminum chloride.

02:13 Just like last time, nothing has changed.

02:15 You can go ahead and flip them.

02:19 So two moles of aluminum chloride corresponds with two moles of aluminum.

02:25 All right.

02:27 So the only ones that we haven't paired up with now are chlorine gas and aluminum chloride.

02:31 So i'm just going to grab the coefficients.

02:33 So three moles of chlorine corresponds with the two.

02:38 Two moles of aluminum chloride.

02:40 So two moles aluminum chloride.

02:46 And nothing has changed.

02:50 Nothing has changed.

02:52 So we can go ahead and just flip it like last time.

02:56 So two moles of aluminum chloride corresponds to three moles of chlorine.

03:06 Just pulled those numbers straight from there.

03:08 I didn't have to figure anything out.

03:09 Luckily, because they had already given us a balanced equation.

03:12 If the equation was not balanced, we have had to balance it first in order to get these correct coefficients...

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