Temperature Change

Odor / Gas Release

Precipitate Formation

Kotz, J. C., & Treichel, P. M. (2024, December 16). Chemical reaction | Definition, Equations, Examples, & Types. Encyclopedia Britannica. https://www.britannica.com/science/chemical-reaction#:~:text=chemical%20reaction%2C%20a%20process%20in,create%20different%20substances%20as%20products.

Temperature Change: A noticeable increase or decrease in heat.

Odor/Gas Release: The production of a distinct smell or emission of gas.

Precipitate Formation: The creation of a solid substance in a solution.

Decomposition

Single Displacement

Double Displacement

Combustion

Acid-base

Decomposition

Single Displacement

Double Displacement

Acid-Base

Combustion

• Color change

• Gas release

• temperature change

• Formation of a precipitate

Source of info: 😘

https://en.m.wikipedia.org/wiki/Chemical_reaction

Libretexts. (2020, August 11). 5.3: Types of chemical reactions. Chemistry LibreTexts. https://chem.libretexts.org/Courses/Valley_City_State_University/Chem_121/Chapter_5%3A_Introduction_to_Redox_Chemistry/5.3%3A_Types_of_Chemical_Reactions#:~:text=The%20five%20basic%20types%20of,into%20more%20than%20one%20category.

Decomposition

Single displacement

Double displacement

Combustion

Acid-base

Endothermic: Absorbs heat (e.g., melting ice).

Decomposition

Single Displacement

Double Displacement

Combination

Acid-Base

Decomposition

Single Displacement

Double Displacement

Combustion

Acid-Base

2) Release of gas/odor, which can be seen as bubbling, fizzing, or the release of an odor

3) Formation of a precipitate, which is a solid substance that forms and separates from a liquid solution

4) A significant and spontaneous change in temperature, either increasing or decreasing, due to the breaking and formation of chemical bonds.

Acidic solutions have a pH less than 7, with lower pH values corresponding to increasing acidity. Common examples of acids include acetic acid (in vinegar), sulfuric acid (used in car batteries), and tartaric acid (used in baking).

Bases

In water, basic solutions will have a

pH between 7-14.

Source:

LumenLearning. (n.d.). Acids and bases. Pressbooks. https://uen.pressbooks.pub/introductorychemistry/chapter/acids-and-bases/#:~:text=An%20acid%20is%20a%20substance,the%20chemical%20opposite%20of%20acids.

Bases - pH is more than 7

If the pH is exactly 7, then it's neutral :)

Odor or Gas release

Temperature change

Color change

A chemical reaction is a process where substances (reactants) are transformed into new substances (products) with different chemical properties.

1. Synthesis (Combination): Two or more substances combine to form one product.

2. Decomposition: A single compound breaks down into simpler substances.

3. Single Replacement: One element replaces another in a compound.

4. Double Replacement: Two compounds exchange elements to form new compounds.

5. Combustion: A substance reacts with oxygen, releasing energy as heat and light.

A chemical reaction is a process where substances interact to form new substances with different properties.

Precipitate formation

Release of odor/gas

Temperature change

Kotz, J. C., & Treichel, P. M. (2024, December 16). Chemical reaction | Definition, Equations, Examples, & Types. Encyclopedia Britannica. https://www.britannica.com/science/chemical-reaction

Gas or Odor Release

Formation of Precipitate

Temperature Change

Acids and bases are chemical substances defined through several theoretical frameworks. Acids are substances that release and is capable of donating hydrogen ions (H⁺) in a reaction, while bases release hydroxide ions (OH⁻) or accept H⁺ ions.

Example:

Acid:

•Sulfuric acid (H₂SO₄): Used in car batteries.

•Acetic acid (CH₃COOH): Found in vinegar.

Base:

•Sodium hydroxide (NaOH): Used in soaps and drain cleaners.

•Baking soda (NaHCO₃): A weak base used in cooking.

Sources:

https://byjus.com/chemistry/acids-and-bases/

chem.libretexts.org

Decomposition

Single Displacement

Double Displacement

Combustion

Acid Base

Acid + Base -> Salt + Water

Acids donate a proton (H+ ion) to another substance. Bases do the opposite: they can accept a proton. This is the biggest acid-base difference.

• Color change

• Formation of a precipitate

• Release of gas/odor

• Change in temperature

Temperature Change

Precipitate Formation

Odor or Gas Release

Decomposition reaction: AB → A + B.

Displacement reaction: A + BC → AB + C.

Double displacement reaction: AB + CD → AD + BC.

Combustion reaction: CH4+2O2→CO2+2H2O.

A combination reaction, also known as a synthesis reaction, is a reaction in which two or more substances combine to form a single new substance.

A decomposition reaction is a reaction in which a compound breaks down into two or more simpler substances.

A single-replacement reaction is a reaction in which one element replaces a similar element in a compound.

A double-replacement reaction is a reaction in which the positive and negative ions of two ionic compounds exchange places to form two new compounds.

A combustion reaction is a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat.

Source:

Libretexts. (2020, August 11). 5.3: Types of chemical reactions. Chemistry LibreTexts. https://chem.libretexts.org/Courses/Valley_City_State_University/Chem_121/Chapter_5%3A_Introduction_to_Redox_Chemistry/5.3%3A_Types_of_Chemical_Reactions#:~:text=The%20five%20basic%20types%20of,into%20more%20than%20one%20category.

2. Formation of a gas – Bubbles or fizzing occur, indicating gas production.

3. Formation of a precipitate – A solid forms from two liquid reactants.

4. Change in temperature – The reaction releases heat (exothermic) or absorbs heat (endothermic).

5. Emission of light or sound – Bright flashes or sounds indicate energy release.

6. Change in odor – A new smell may form due to the reaction.

A. Combination: A reaction when 2 or more reactants combine to form a single product.

B. Decomposition: A single reactsnt breaks down into simpler ones. (Reverse of Combination reaction)

C. Single Displacement: One element replaces another element from a compound.

D. Double Displacement: When the positive ions (cations) and negative ions (anions) of different compound switch places, forming two entirely different compounds.

E. Combustion: When oxygen combines with a hydrocarbon to form water and carbon dioxide.

F. Acid-Base: A special kind of double displacement reaction that takes place when an acid and base react with each other.

A chemical reaction is a process that breaks and forms chemical bonds between one or more substances, known as reactants, to create new substances as products. As a result of this process, the substances' chemical components and characteristics change.

Sources:

https://www.britannica.com/science/chemical-reaction

Temperature Change

Formation of Precipitate

Release of Gas/Odor

Base - 7 above

Neutral - 7

SOURCE:

Admin. (2023, May 29). Chemical Reactions - Definition, Equations, Types, Examples with FAQs of Chemical Reactions.BYJUS. https://byjus.com/chemistry/chemical-reactions/

https://chem.libretexts.org/Bookshelves/Inorganic_Chemistry/Supplemental_Modules_and_Websites_(Inorganic_Chemistry)/Chemical_Reactions/Chemical_Reactions_Examples/Chemical_Reactions_Overview

The basis for different types of reactions is the product formed, the changes that occur, the reactants involved and so on. Different types of reactions are

• Combustion reaction

• Decomposition reaction

• Neutralization reaction

• Redox Reaction

• Precipitation or Double-Displacement Reaction

• Synthesis reaction

Kotz, J. C., & Treichel, P. M. (2024, December 16). Chemical reaction | Definition, Equations, Examples, & Types. Encyclopedia Britannica. https://www.britannica.com/science/chemical-reaction

in order to create a new material, a chemical reaction occurs when the bonds between reactant and product molecules are destroyed and new bonds are created.

BYJU’S. (n.d.). Chemical reactions. Retrieved January 27, 2025, from https://byjus.com/chemistry/chemical-reactions/

Acids are hydrogen-based substances that have lost protons, while bases are the opposite and can neutralize acids.

Acids and bases are fundamental concepts in chemistry, characterized by their hydrogen ion activity and measured on the pH scale from 0 (strongest acid) to 14 (strongest base)

(https://10.1016/b978-0-12-811816-0.00008-7)

1. Color change

2. Precipitate formation

3. Release in gas/odor

4. Temperature change

Kotz, J. C., & Treichel, P. M. (2024, December 16). Chemical reaction | Definition, Equations, Examples, & Types. Encyclopedia Britannica. https://www.britannica.com/science/ch

emical-reaction

Decomposition

Single Displacement

Double Displacement

Combustion

Acid-Base

BYJU'S. (n.d.). Why do we balance the chemical equation? Retrieved January 27, 2025, from [https://byjus.com/question-answer/why-do-we-balance-the-chemical-equation/](https://byjus.com/question-answer/why-do-we-balance-the-chemical-equation/)

Color Change: A visible shift in color, such as rusting or iodine reacting with starch.

Energy Change: Release or absorption of energy, seen as temperature changes, heat, or light

Gas Production: Formation of bubbles or visible gas, like carbon dioxide in vinegar and baking soda reactions.

Precipitate Formation: Appearance of a solid when two solutions react, like silver chloride forming from silver nitrate and saltwater reactions.

Source: LibreTexts. (n.d.). Evidence of a chemical reaction. In Introduction to chemistry. Anoka-Ramsey Community College.Whttps://chem.libretexts.org/Courses/AnokaRamsey_Community_College/Introduction_to_Chemistry/07%3A_Chemical_Reactions/7.02%3A_Evidence_of_a_Chemical_Reaction#:~:text=Chemical%20reactions%20can%20be%20identified,the%20formation%20of%20a%20precipitate

Kotz, J. C., & Treichel, P. M. (2024, December 16). Chemical reaction | Definition, Equations, Examples, & Types. Encyclopedia Britannica. https://www.britannica.com/science/chemical-reaction

BECAUSE.. chemical equation needs to be balanced so that it follows the law of conservation of mass. A balanced chemical equation occurs when the number of the different atoms of elements in the reactants side is equal to that of the products side.

source: https://study.com/academy/lesson/balanced-chemical-equation-definition

shawtawt to iRbi 😍🥺❤️‍🔥

1. Combination or Synthesis - a reaction when two or more elements combine

to form a single product.

General equation: A + B → AB

Example: Sodium + Chlorine gas → Sodium chloride

2. Decomposition - a single reactant breaks down into simpler ones. It is the opposite of combination reaction.

General equation: AB → A + B

Example: Sodium chloride → Sodium + Chlorine gas

3. Single Displacement (Replacement) – A substance; it can be an element or

a compound; capable of replacing one of the atoms of a given compound.

General equation: AB + C → AC + B

Example: Potassium bromide + chlorine gas → Potassium chloride + bromine

gas

KBr + Cl2 → KCl + Br2

4. Double Displacement (Replacement) – a reaction in which ions get

exchanged between two reactants, resulting to the formation of a new

compound.

General equation: AB + CD → AD + CB

Example:

Silver nitrate + Magnesium chloride → Silver chloride + Magnesium

nitrate

AgNO3(aq) + MgCl2(s)) → AgCl(s) + MgNO3(aq)

5. Combustion (Burning) Reaction – a reaction wherein oxygen gas combines

with a hydrocarbon; a compound containing carbon and hydrogen atoms;

forming carbon dioxide and water as the products.

General equation: CnHn + O2 → CO2 + H2O

6. Acid-Base Reaction or Neutralization Reaction - special kind of double

displacement reaction that takes place when an acid and a base react. In

general, the products of this reaction are salt and water.

General equation: Acid + Base → Salt + Water

HCl + NaOH → NaCl + H20

1. Color change – Formation of a new substance.

2. Temperature change – Heat released or absorbed.

3. Gas production – Bubbles or gas observed.

https://www.britannica.com/science/chemical-reaction

A chemical reaction is a process where reactants are transformed into different products due to a redistribution of atoms.

(https://10.1515/9783110622096-toc)

Acid Taste sour, turn blue litmus paper red, and release hydrogen (H+) in water. Examples: lemon juice, vinegar.

Bases Taste bitter, feel slippery, turn red litmus paper blue, and release hydroxide ions (OH) in water. Examples: soap, baking soda.

Fun fact about Hydrofluoric acid. Its unique and dangerous because, unlike most acids, it can penetrate skin and attack deep tissues, including bones. Despite its danger, it's widely used to clean metals and glass!

 Combination reaction

 Combustion reaction 

Neutralization reaction

 Single displacement reaction

 Double displacement reaction 

Precipitation reaction

https://www.vedantu.com/chemistry/types-of-chemical-reactions

1. Combination

2. Decomposition

3. Combustion

4. Single Displacement

5. Double Displacement

6. Acid-base Reaction

   
   

1. Arrhenius Definition: This idea says acids are substances that release hydrogen ions (H⁺) in water, and bases are substances that release hydroxide ions (OH⁻). This idea was first explained by a scientist named Svante Arrhenius in 1883.

2. Another way is a more complex way which is Brønsted-Lowry definition, which focuses on acids giving away hydrogen ions (H⁺) and bases taking them.

3. Another way, called the Lewis definition, is a bit more technical and looks at how substances share or take electrons.

Reference : Clark, J., Broderick, C., & Moussa, M. (2019, February 23). Overview of Acids and Bases. Chemistry LibreTexts. https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Supplemental_Modules_(Physical_and_Theoretical_Chemistry)/Acids_and_Bases/Acid/Overview_of_Acids_and_Bases

‌

Decomposition

Single Displacement

Double Displacement

Combustion

Acid-Base

Kotz, J. C., & Treichel, P. M. (2024, December 16). Chemical reaction | Definition, Equations, Examples, & Types. Encyclopedia Britannica. https://www.britannica.com/science/chemical-reaction

A chemical reaction, is a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.

Kotz, J. C., & Treichel, P. M. (2024, December 16). Chemical reaction | Definition, Equations, Examples, & Types. Encyclopedia Britannica. https://www.britannica.com/science/chemical-reaction

BYJU'S. (n.d.). Why do we balance the chemical equation? Retrieved January 27, 2025, from https://byjus.com/question-answer/why-do-we-balance-the-chemical-equation/

• Tastes Sour

• Turns blue litmus paper red

• pH level is less than 7

• Examples: Lemon juice, Vinegar, Hydrochloric acid.

Base - is a substance that produces hydroxide ions (OH-) when dissolved in water, usually tasting bitter and feeling slippery to the touch.

• Tastes Bitter

• Turns red litmus paper blue

• pH level is higher than 7

• Examples: Soup, Baking soda, Sodium Hydroxide.

SOURCE: Encyclopaedia Britannica. (n.d.). Chemical reaction. In Britannica. Retrieved January 27, 2025, from https://www.britannica.com/science/chemical-reaction

We can see that these events that are happening when a chemical reaction is taking

place can readily be observed by the five senses.

Chemical reaction is a process in which one or more substances are converted to one or more different substances. In other words, chemical reaction is the process

where a material is transformed into a new one, possessing a new composition. Chemical changes are always represented by a chemical equation. A chemical

equation is a symbolic representation of a chemical reaction. There are two parts of a chemical equation, the reactants and the products. Reactants are the substances

before reaction and written on the left side of the chemical equation. Products are the substances resulting from the reaction and presented at the right side of the

chemical equation. The reactants and products are separated by an arrow.

• 2 or more reactants form to produce a single product

• A+B -> AB

B. Decomposition Reaction

• Opposite of Combination

• A single reactant breaks down into simpler ones

• AB -> A+B

C. Single Displacement/ Replacement reaction

• One element (more reactive) replaces another (less reactive) in a compound

• AB+C -> AC+B

D. Double displacement/ Metathesis Reaction

• Two compounds swap (cations & anions)

• AB+CD -> AD+CB

E. Combustion/ Burning Reaction

• Hydrocarbon reacts with oxygen to produce CO2 & H2O

• Cx+Hy+02 -> CO2 + H20

1. Combination

2. Decomposition

3. Combustion

4. Single Displacement

5. Double Displacement

6. Acid Base

1. COMBINATION: 2 or more reactants combine. A+B➡️AB

2. DECOMPOSITION: a single reactant breaksdown into simpler ones. AB➡️A+B

3. SINGLE DISPLACEMENT: one element replaces another element from a compound.

   A+BC➡️AC+B

4. DOUBLE DISPLACEMENT: when the positive ions and negative ions of diff. Compounds switch places. AB+CD➡️AD+CB

5. COMBUSTION: when oxygen combines with a hydrocarbon to form a water and carbon dioxide. C4 H10+O2➡️ CO2+H2O

6. ACID BASE: special kind of double displacement reaction that takes place when acid and base react with eachother. HCI+NaOH➡️NaCl=H2O

NCI Dictionary of Cancer Terms. (n.d.). Cancer.gov. https://www.cancer.gov/publications/dictionaries/cancer-terms/def/acid#:~:text=(A%2Dsid),an%20acid%20is%20hydrochloric%20acid.

── .✦ SOURCE:

Admin. (2024b, June 24). Acids and Bases - Definition, Examples, Properties, Uses with Videos & FAQs. BYJUS. https://byjus.com/chemistry/acids-and-bases/#:~:text=An%20acid%20is%20any%20hydrogen,identified%20by%20their%20sour%20taste.

6. 𝗣𝗿𝗲𝗰𝗶𝗽𝗶𝘁𝗮𝘁𝗲 𝗙𝗼𝗿𝗺𝗮𝘁𝗶𝗼𝗻 - 𝖳𝗁𝖾 𝖿𝗈𝗋𝗆𝖺𝗍𝗂𝗈𝗇 𝗈𝖿 𝖺 𝗌𝗈𝗅𝗂𝖽 𝗌𝗎𝖻𝗌𝗍𝖺𝗇𝖼𝖾𝗌.

2. Decomposition

3. Single Displacement

4. Double Displacement

5. Combustion

6. Acid-Base

BYJU'S. (n.d.). Acids and bases. Retrieved January 27, 2025, from https://byjus.com/chemistry/acids-and-bases/

Source: https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.energy.gov/science/doe-explainscatalysts%23:~:text%3DA%2520catalyst%2520is%2520a%2520substance,being%2520consumed%2520during%2520the%2520reaction.&ved=2ahUKEwjvgK_c75SLAxW9ffUHHbmzGH4QFnoECFwQBQ&usg=AOvVaw1nzTimAbz7L9Z4enH3Tp3D

Combination : Two or more substances combine to form a new compound.

2. Decomposition : A single compound breaks down into simpler substances.

3. Single Displacement : One element replaces another in a compound.

4. Double Displacement Reaction : Two compounds exchange partners to form new compounds.

5. Combustion : A substance reacts with oxygen to produce heat and light.

6. Acid-Base : A chemical process where an acid donates a hydrogen ion (H⁺) to a base

1) Change in color: This means something new with a different color is being made. For example, if you mix two clear liquids and they turn bright yellow, that’s a big clue something chemical is happening!

2) Relase of odor: Sometimes, gas is made during a chemical change. You might see bubbles fizzing up, or you might smell something new in the air.

3) Percipitate Formation: This is called a precipitate. It’s like magic! You mix two liquids together, and suddenly, tiny solid bits appear and settle at the bottom.

4) Temperature Change: This means energy is being used or released. You might feel the mixture getting really warm or icy cold without you doing anything—just because the chemical change is happening!

Reference: Chemical Change: Signs & Evidence - Video & Lesson Transcript. (n.d.). Study.com. https://study.com/academy/lesson/chemical-change-signs-evidence.html

‌

SOURCE:

The Editors of Encyclopaedia Britannica. (1998, July 20). Catalyst | Examples, Definition, & Facts. Encyclopedia Britannica. https://www.britannica.com/science/catalyst

2. Decomposition

3. Single Displacement

4. Double Displacement

5. Acid - Base

6. Combustion

• color change

• formation of a precipitate

• formation of a gas

• odor change

• temperature change

shawtawt to tRixi 🥺🥰🫰

An oxidizer reacting with a combustible material to produce an oxidized product

2. Decomposition Reaction

A process in which one component decomposes into several products

3. Single Displacement

occurs when another element in a compound is replaced by an element

4. Synthesis/combination Reaction

One of the simplest kinds of reactions is a synthesis reaction, in which several simple molecules mix to form a complex product under specific physical circumstances.

5. Double-Displacement Reaction

occurs when two compounds react, causing their cations and anions to swap positions to generate two new products.

6. Acid base

the removal of a hydrogen ion from the acid and its addition to the base

BYJU’S. (n.d.). Chemical reactions. Retrieved January 27, 2025, from https://byjus.com/chemistry/chemical-reactions/

Acids have a pH between 1 and 7. They taste sour, turn blue litmus red, and release hydrogen ions in water.

Bases (8-14):

Bases have a pH between 8 and 14. They taste bitter, feel slippery, turn red litmus blue, and release hydroxide ions in water.

An endothermic process absorbs heat and cools the surroundings.

SOURCE: https://www.khanacademy.org/test-prep/mcat/chemical-processes/thermochemistry/a/endothermic-vs-exothermic-reactions#:~:text=An%20exothermic%20process%20releases%20heat,them%20as%20endothermic%20or%20exothermic.

SOURCE:

Libretexts. (2024, April 28). 5: Thermochemistry. Chemistry LibreTexts. https://chem.libretexts.org/Bookshelves/General_Chemistry/Map%3A_Chemistry_-_The_Central_Science_(Brown_et_al.)/05%3A_Thermochemistry

Two or more substances combine to form a single product.

𝐴+B --> 𝐴𝐵

2. Decomposition Reaction

A single compound breaks down into two or more simpler substances.

AB --> A+B

3. Single Displacement

One element replaces another element in a compound.

A+BC --> AC+B

4. Double Displacement

The ions of two compounds exchange places in an aqueous solution to form two new compounds.

𝐴𝐵+𝐶𝐷 --> 𝐴𝐷+𝐶𝐵

5. Combustion Reaction

A substance combines with oxygen, releasing energy in the form of heat and light. Usually involves hydrocarbons and oxygen.

6. Acid-Base Reaction

An acid reacts with a base to form water and a salt.

Decomposition

Single Displacement

Double Displacement

Combustion

Acid-Base