Types of Chemical Reactions 

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Types of Chemical Reactions 1- Combustion Reaction • in combustion, something is burning and it releases a lot of heat energy. • if you see CO2 and water in the product then it's a combustion reaction. • All "Combustion" reactions are "Redox Reactions". 2- Synthesis\Combination reaction • A + B = AB • you simply combine the reactants to make the product. • If two pure elements combine to form a compound then it's a "Redox Reaction". • If two small compounds combine to form a large compound then it's probably NOT a "Redox Reaction". 3- Decomposition reaction • AB = A + B • the opposite of the Synthesis\Combination reaction: simply breaks down reactants to make the product. • heat and electricity cause decomposition reactions • If a compound breaks down into pure elements then it's a "Redox Reaction". • If a large compound breaks into two small compounds then it's probably NOT a "Redox Reaction". 4- Single replacement reaction • A + BC = AC + B • Just as the name says, a single molecule from the same equation replaces another. • For the most part, metals tend to replace metals and nonmetals tend to replace nonmetals. • All "Single Replacement" reactions are "Redox Reactions". 5- Double Replacement reaction • AB + CD = AD + BC similar to the Single replacement reaction; however, this one is double, and completely switches elements' places up. • Both of the reactants must be aqueous • When a double replacement happens between two aqueous solutions and the products all remain aqueous then no reaction took place. • A "Double Replacement" reaction is NEVER a "Redox reaction" • Double Replacement reaction types: - if a double replacement of two aqueous products happens and you find a solid in the product then it's called a "Precipitation Reaction". - If a double replacement happens between a strong acid and a strong base it will produce water and salt and will be called "Acid-Base Neutralisation Reaction". - if a double replacement of two aqueous products happens and you find a gas in the product then it's called a "Gas Evolution Reaction". ـــــــــــــــــــــــــــــــــ -Redox Reactions: Also called "oxidation-reduction reaction", is any chemical reaction in which the oxidation number of atoms changes. -Methane(CH4) is also called: Natural gas. -Almost all ionic compounds are considered salts.

Here are some timestamps Synthesis- 2:10 Decomposition- 4:21 Single Replacement- 9:00 Double replacement- 12:08 Combustion- 0:00

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Would you please tell how we can find out when it is aqueous,liquid or solid?

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Professor Organic Chemistry Tutor, thank you for explaining and analyzing different types of Chemical Reactions in AP/General Chemistry. All Chemical Reactions come with different compounds. Breaking down large compounds into small compounds is an excellent way to comprehend Chemical Reactions. This is an error free video/lecture on RU-vid TV with the Organic Chemistry Tutor.

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23:50 How do you know when a product is solid vs aqueous/soluble? Just memorize everything?

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(Decomposition or analysis) vs (combination or synthesis), I believe analysis was missing at decomposition part

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Fe + O2 =Fe2O3 is this combustion or formation?

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Um octane is C8 H18 not H8

In the example: Na2S + HCL -> NaCl + H2S Why did you put the 2 on the H instead of the Na for he product?

I get how you do the reactions but not the why Why does there have to be a reaction in general? E.g. Na2S + HCl -> NaCl + H2S Does everything react or do some stay the same?

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sir if we run electricity through water it decomposes ! in daily lives we use electric rods to heat water did this is same to decomposition ??

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In KClO3 it is KCl + O2 and not KCl + O3

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Octane = C8H18

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wait i thought c8h8 is styrofoam... Isnt octane c8h18 or something

Mistake you had to get K2SO4 not Na

you meant K not Na in H2SO4 + KOH= H2O + Na2SO4?

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24:40

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27:22 How come it's not K + ClO3?

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Also known as A DOUBLE REPLACEMENT REACTION 💀

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Synthesis: Putting Together Decomposition: Breaking Up Single Replacement: “I’m leaving you for your friend” Double Replacement: “Wife Swap” Combustion: “Taylor Swift” - - All Credits to my science teacher - The Taylor Swift one: does the same thing over and over again. Gets a boy. They break up. She writes a song. - Hope this helps!

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when i read the notes i didn't understand but after watching this tutorial, i clearly understand and can differentiate between different types of reactions. thanks alot

on 28:39 one of the products isn't Na2SO4 but K2SO4.

Save time here: Synthesis a+b -> ab Decomposition ab -> a+b Single replacement A+BC -> AC+B Double Replacement AB+CD -> AD + BC Combustion using heat and basically anything with O2

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In 37:37, is it also possible to have a combustion reaction there since it produced water and CO2?

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yes veryt easy to understand , the examples woulda been nice to do it in a lab to actually see it, the examples wont help identify a reaction , an actually lab action would of been nice

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What dry salts when mixed they produce benzene ,its called decorboxilatio reaction ,breacking carbon benzene bond in no oxygen and collect the yellow diatilate ,bit you have to redistill ,told you to use fractionatin column ,so you dont have to work twice