Solution stoichiometry deals with stoichiometric calculations in solutions that involve volume and molarity. So if you've watched my videos on stoichiometry, you are pretty familiar with our stoichiometric chart. Now that we are including solution stoichiometry, we're going to adapt it slightly to fit the situations where now volume and molarity are sometimes given. Here in our solution stoichiometric chart, we're going to say a chart uses the given quantity of a compound to determine the unknown quantity of another compound.

In this example, we have our balanced chemical equation which states: for every 2 Na(s) reacting with 2 H2 O (l), we produce 1 H2 (g) and 2 NaOH (aq). We are given that water has a volume of 38.74 milliliters of 0.275 molar. This is our given information. We are asked to determine the grams of H_{2}.

Remember in our stoichiometric chart, on the left side is where we have our given information. We are used to seeing our given information in grams or moles, but now with solution stoichiometry, it will also be given as a volume of some molarity. Recall that "of" between two numbers means multiply. Note here that moles equal liters times molarity. So, if you were to convert these mL to liters and multiply them by the molarity, then this new given shape we are seeing feeds directly into our moles of given.

Once we have our moles of given, it's our job to get to our unknown. Our unknown is what we are looking to find. Here our unknown is H_{2} and we need to find it in grams. Using the stoichiometric chart, we go from the moles of given, which is H_{2}O, and we make the jump. In this jump, we're moving from an area where we have information we know to where we don't have any information about the unknown. This requires a mole to mole comparison, using the coefficients in the balanced equation. At this point, it would take us to moles of H_{2}, and then it's up to us to go to either grams of H_{2} or ions, atoms, formula units, or molecules of whatever the unknown would be.

This method is a continuation of our understanding with stoichiometry, but now we include molarity and volume in our calculations. If you haven't watched my video on stoichiometry, I highly suggest you go back and check out a couple of those videos. We are moving forward with this idea, now incorporating volume and molarity into our calculations. Now that we've seen this new stoichiometric chart, let's move on to some questions where we put it to practice.