Sunday, October 18, 2020

Grams to Grams Stoichiometry (Overview)

General Chemistry Index

Where are we going with this? This page will give the ability to demonstrate an understanding of the law of conservation of mass through the use of particle diagrams and mathematical models.

Grams to Grams Stoichiometry
Here, we put it all together!

Suppose you have eleven grams of something. If you combine it with something else, how many grams of the other thing do you need and how many grams will be produced of the whatever…

Wow! That escalated really fast!

Grams to grams stoichiometry is kind of the culmination of the laws of conservation as it relates to chemical reactions. To be so important, it seems like it should be harder!

How Does This Thing Work?

A'ght, let's break this down.

You have some mass of something.

You need find out the mass of that other thing (or things). Or you need to find the mass of the thing that will be produced (because no one sells things by the mole. Now that I said that, someone will probably contradict me with some obscure example!).

What do you do?

First off, you gotta have a balanced equation

Next, you gotta convert the mass you have (or weight, if things are awful) in to moles (by using the molecular weights.

Then, you are going to use the number of moles you have to figure out how many moles of the rest of the stuff will be required.

Then, convert the moles you calculated into the masses.

Can we put that into a list?
Mass given to moles given. 
Convert from moles needed / produced to masses needed / produced. 
See Moles to Grams to Moles

That makes it look a lot easier! (I always figure I left something out when I make a list like this.)


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