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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.

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

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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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 KZfaq TV with the Organic Chemistry Tutor.

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

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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?

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

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In the decomposition ex. 1 Why does metal oxide has still oxygen, if all the gases will escape to the air?

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

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

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30:13 does k become (k)2 due to the separation from O and H?

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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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22:16 why the reaction takes place since Pb is less reactive than Na? PLEASE SOMEONE ANSWER ME

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In your other video of Predicting the Reaction You have inverted Synthesis and Decomposition reaction Pls, I'm confused which one is correct

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With the simple replacement reaction when do you know when to replace A with B or C ?

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Mg + O2 = Mgo...can this be also a combustion reaction? coz a lot of heat and light is given off.

27:12 would that be a complete combustion?

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Why at 8:35 is the top equation not an acid replacement? Doesn’t an acid replacement produce salt and water?

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