02/01/20 Dr Seemal Jelani Chem-100 1 Identify, give

02/01/20 Dr Seemal Jelani Chem-100 1 Identify, give

02/01/20 Dr Seemal Jelani Chem-100 1 Identify, give evidence for, predict products of, and classify the following types of chemical reactions: 1. Synthesis (combination) 2. Decomposition 3. Single Replacement 4. Double Replacement 5. Neutralization (acid/base) 6. Combustion 02/01/20 Dr Seemal Jelani

Chem-100 2 Synthesis Decomposition Neutralization Single displacement Double displacement Combustion 02/01/20 Dr Seemal Jelani Chem-100 3 A chemical change: any change in which a new substance is formed.

Evidence of a Chemical Change: Release of energy as heat Release of energy as light Change in colour Formation of a gas Change in odour 02/01/20 Dr Seemal Jelani Chem-100 4 1. Neutralization: Acid(H) + Base(OH) salt + H(OH) 2.

Combustion: AB + oxygen CO2 + H2O 3. Synthesis: A + B AB 4. Decomposition: AB A + B 5. Single displacement: A + BC AC + B 6. Double displacement: AB + CD AD + CB 02/01/20

Dr Seemal Jelani Chem-100 5 Synthesis reactions are also known as FORMATION reactions. Two or more reactants (usually elements) join to form a compound. A + B AB where A and B represent elements The elements may form ionic compounds, like Sodium metal and chlorine gas combine to form sodium chloride.

2Na + Cl2 2NaCl Sodium added to chlorine gas See pages 258 - 259 Dr Seemal Jelani 02/01/20 Chem-100 6 Types: Synthesis Example C + O2 C + O O O C O

C O O O C O O C O CC O O O C O O C C C OC OOC C OCO OO CO O O OO OO OOO General: 02/01/20 A + B AB

Dr Seemal Jelani Chem-100 7 OTHER EXAMPLES 1.Elements that form ionic compounds: Magnesium metal reacts with oxygen gas to form magnesium oxide. 2Mg + O2 2MgO 2. Elements that form covalent compounds: Nitrogen gas and oxygen gas join to form dinitrogen monoxide. 2N2 + O2 2N2O SYNTHESIS REACTION (iron + sulphur): http://www.youtube.com/watch?v=A5H6DVe5FAI Dr Seemal Jelani

02/01/20 Chem-100 See pages 258 - 259 8 Decomposition reactions are the opposite of synthesis reactions. A compounds breaks down into two or more products (often elements). AB A + B where A and B represent elements 1. Ionic compounds may decompose to produce elements, like the following: Table salt, sodium chloride, can be broken down into sodium metal and chlorine gas by melting salt at 800C and running electricity through it.

2NaCl 2Na + Cl2 See page 260 Dr Seemal Jelani 02/01/20 Chem-100 9 Types: Decomposition Example: NaCl Cl Na General: 02/01/20 Cl

+ Na AB A + B Dr Seemal Jelani Chem-100 10 Types: Decomposition Example 2HgO O Hg Hg O Hg

Hg General: 02/01/20 + O O AB A + B Dr Seemal Jelani Chem-100 11 2. Covalent compounds may decompose into elements, like the following:

By running electricity through water, the water molecules decompose into hydrogen and oxygen gases. 2H2O 2H2 + O2 DECOMPOSITION REACTION: http://www.youtube.com/ watch?v=NddwtXEA_Ak See page 260 Dr Seemal Jelani 02/01/20 Chem-100 12 Single replacement reactions replace one element from a compound with another

element. A compound and an element react, and the element switches places with part of the original compound. A + BC B + AC where A is a metal, or A + BC C + BA where A is a non-metal See page 261 Dr Seemal Jelani 02/01/20 Chem-100 13 02/01/20 Dr Seemal Jelani

Chem-100 14 Types: Single displacement Example: Zn + CuCl2 Cl Cu Cl + General: 02/01/20 Zn

Cl Zn Cl + Cu AB + C AC + B Dr Seemal Jelani Chem-100 15 1. When A is a metal: Aluminum foil in a solution of copper(II) chloride produces solid copper and aluminum chloride. 2Al + 3CuCl2 3Cu + 2AlCl3

2. When A is a non-metal: When fluorine is bubbled through a sodium iodide solution, iodine and sodium fluoride are produced. Fl2 + 2NaI I2 + 2NaF 02/01/20 SINGLE REPLACEMENT: Dr Seemal Jelani Chem-100 http://www.youtube.com/watch?v=hKtynbVtMKc 16 Double replacement reactions swap elements between 2 compounds that react together to form two new compounds. Two compounds react, with elements switching places between the original compounds. AB + CD AD + CB

See page 262 Dr Seemal Jelani 02/01/20 Chem-100 17 See page 262 Dr Seemal Jelani 02/01/20 Chem-100 18 Types: Double displacement Example: MgO + CaS Mg

O + General: 02/01/20 Ca Mg S S + Ca O

AB + CD AD + CB Dr Seemal Jelani Chem-100 19 Two solutions react to form a precipitate (solid) and another solution. Ionic solution + ionic solution ionic solution + ionic solid. AB + CD AD + CB When potassium chromate and silver nitrate react, they form a red precipitate, silver chromate, in a solution of potassium nitrate. K2CrO4 + 2AgNO3 Ag2CrO4 + 2KNO3 silver chromate

DOUBLE REPLACEMENT: http://www.youtube.com/watch?v=opY3FLrPTa4 Dr Seemal Jelani 02/01/20 Chem-100 20 Neutralization reactions occur when an acid (most compounds starting with H) and a base (most compounds ending in OH) react to form a salt and water. Neutralization reactions are a type of double replacement. Acid + base salt + water HX + MOH MX + H2O where X and M are elements

See page 263 Dr Seemal Jelani 02/01/20 Chem-100 21 1. Sulfuric acid is used to neutralize calcium hydroxide: H2SO4 + Ca(OH) 2 CaSO4 + 2H2O 2. Phosphoric acid helps to neutralize the compounds that cause rust, such as iron(II) hydroxide. H3PO4 + 3Fe(OH)2 Fe3(PO4)2 + 6H2O NEUTRALIZATION: http://www.youtube.com/watch?v=_P5hGzA6Vb0 See page 263 Dr Seemal Jelani 02/01/20

Chem-100 22 Combustion reactions occur when a compound or element react with oxygen to release energy and produce an oxide. Also sometimes referred to as hydrocarbon combustion. CXHY + O2 CO2 + H2O where X and Y represent integers METHANOL + oxygen: http://www.youtube.com/watch?v=98JuJ-G1qXY&feature=related See page 264 Dr Seemal Jelani 02/01/20 Chem-100

23 1. Natural gas (methane) is burned in furnaces to heat homes. CH4 + O2 CO2 + 2H2O + energy 2. An acetylene torch is used to weld metals together. 2C2H2 + 5O2 4CO2 + 2H2O + energy 3. Carbohydrates like glucose combine with oxygen in our body to release energy. Acetylene torch C6H12O6 + 6O2 6CO2 + 6H2O + energy See page 264 Dr Seemal Jelani

02/01/20 Chem-100 24 MOVIE TO REVIEW: http://www.bcscience.com/bc10/pgs/videos_013_chemical_reactions.html Dr Seemal Jelani 02/01/20 Chem-100 Take the Section 6.1 Quiz See page 265 25

Recently Viewed Presentations

  • Leveraging Data Science for Increased Accountability

    Leveraging Data Science for Increased Accountability

    About ethics. About all the assumptions (including about ethics) that you bake into your methods. And you need knowledge/expertise and time for this. While there is no free lunch, you have a real chance of improving your approach this way....
  • Defense Security Service Risk Management Framework (RMF) May

    Defense Security Service Risk Management Framework (RMF) May

    ) is completed.(Note: Seek information from all available sources (e.g., Government Customer/Information Owner, Program Managers, Local service risk/threat developed documents) Document the system description, including the system/authorization boundary, in the System Security Plan.
  • Nurses Experiences of Leech Therapy in Plastic and ...

    Nurses Experiences of Leech Therapy in Plastic and ...

    [email protected], [email protected] This template can be used as a starter file for presenting training materials in a group setting. Sections. Right-click on a slide to add sections. Sections can help to organize your slides or facilitate collaboration between multiple authors.
  • Différentes sources des cellules souches

    Différentes sources des cellules souches

    * SMP = maladies acquise et clonales de la cellule souche hématopoiétique Avec hyperplasie myeloide predominant sur une lignée Physiopath Bien connue pour la LMC - Bcr-Abl = interfère avec de nombreuses voies de transduction --> voies Ras/Map kinases, PI3...
  • Student/Faculty Research Day - MINDS@UW Home

    Student/Faculty Research Day - [email protected] Home

    Kristina Malec Faculty Mentor - Dr. Heather Ann Moody Social Work/American Indian Studies University of Wisconsin-Eau Claire Quantitative Data Suggestions Self - Determination "Indigenous communities are their own strongest asset.
  • Budgeting: Making the Most of Your Money

    Budgeting: Making the Most of Your Money

    Assignment 2-1 How am I Doing? Compare your spending log from Unit 1 with your financial plan. How well your current spending habits represents your financial goals? If not what type of budget (spending plan) are we going to have...
  • Leveraging Translation Efficiency 2Q, 2012

    Leveraging Translation Efficiency 2Q, 2012

    IBMs MT Engine. RTTS provides machine translation for n.Fluent&other applications. APIs allow other applications to access these translation services. Customization tools - Domains, chat-specific models, … Commercially licensed to IBM partners . Language Pairs to/from English: n.Fluent. IBMs MT translation...
  • MEL-Con Writing Strategy

    MEL-Con Writing Strategy

    Conclusion. The last sentence of the paragraph . Summarizes the thesis in original words. Mentions the three pieces of evidence again very briefly. AVOID: "All in all" or "In conclusion" or "Finally" or "To sum it all up"(these are overused,...