How to Predict Products of Chemical Reactions How to Pass Chemistry

Hello hello Melissa Maribel here to show you how to predict products of chemical reactions. For predicting products make sure you guys know your charges of all of your elements and your polyatomic atoms. Alright are you ready to get started? Let's dive right in. For this example we are only given our reactants and we're gonna determine our products. So what like to look at is my little trick for you. Kind of like FOIL-ing, going back to math. The inner goes with the inner and the outer goes with the outer. So if we apply that trick where our inner elements then combine to form compound. Let's go ahead, and always remembering that our metal goes first, so the positive goes first then the negative goes first. How like to remember this is, you always want to be positive before your negative. This is going back to you also an ionic compound where we have metal that's positively charged combined with nonmetal that's negatively charged. So aluminum has 3+ charge and phosphate, one of our polyatomic atoms, has 3- charge. So luckily right then and there that's completely balanced for our charges. So our first product we don't have to add any other subscript and it's just aluminum and phosphate. That's the inner with the inner. Now let's look at our outer with our outer. So our outer with our outer, we'll combine these two to form our next product, or our next compound. Always thinking positive before we think negative and we're going to put that potassium first since that is our metal and that's our positive charge and then it will be followed by nitrate since that's our negative charge. So potassium has +1 charge and nitrate or NO3 has -1 charge. Note that did not bring this subscript that 3 on down because that 3 was only there to balance out the charges within potassium, within this compound as whole. Same thing with this other subscript of 3, for nitrate did not bring that down, this is totally different 3 right took that 3 from O3 because that's just what our polyatomic atom is. So these other substrates do not come down when you're predicting your products. Now continuing with this, our charges are completely balanced so we will get our next product of potassium nitrate. Note that have not balanced this out I'm actually not going to be balancing equations right now just showing you how to predict products as whole. Let's try another example with that whole inner with the inner and outer with our outer to predict our products given our reactants. So our inner with our inner, this sodium and the nitrate. Those two would combine to form our first product. Remember you want to think positive before you think negative. So our positive is that metal or that Na. This has positive 1 charge I'm not bringing that 2 subscript down because that 2 was only there to balance out sodium within this compound or combining to carbonate. Next let's go ahead and bring down that NO3 with -1 charge, once again I'm not bringing down that 2 subscript, looking back at our compound that forms our product that forms it's completely balanced of charges so we will get our first product of sodium nitrate. Now let's look at our next product, the outer with the outer, so magnesium with carbonate. These two would then combine to form our final product and this would give us Mg, so remember positive before you think negative, and we'll have magnesium with 2+ charge and Co3 or carbonate with 2- charge. How lovely they are balanced out for us, the charges are already. So that would be our final product, magnesium carbonate. Once again did not balance out our overall chemical reaction, just showing you how to predict products with the inner with the inner and outer with the outer. encourage you to keep going, keep practicing, keep trying your best. You can and you will pass chemistry. If you still feel like you have some questions that you just really aren't sure of, reserve your spot today for live tutoring with myself where you can ask those questions and learn and get into lot of detail with examples and just overall practice problems understanding these chemistry concepts as whole. If you learned something today make sure to give this video LIKE and subscribe if you want to keep on learning more things about chemistry. I'll see you guys next time.