Chemical Reactions - Chemistry Geek

Chemical Reactions - Chemistry Geek

Chemical Reactions Chemistry I Chapter 11b Chemistry I Honors Chapter 8 SAVE PAPER AND INK!!! When you print out the notes on PowerPoint, print "Handouts" instead of "Slides" in the print setup. Also, turn off the backgrounds ICP Chapter 21b (Tools>Options>Print>UNcheck "Background Printing")! Types of Reactions There are five types of chemical

reactions we will talk about: 1. 2. 3. 4. 5. Synthesis reactions _____________ reactions Single displacement reactions ________________ reactions Combustion reactions You need to be able to identify the

type of reaction and predict the product(s) Steps to Writing Reactions Some steps for doing reactions 1. 2. 3. Identify the type of reaction Predict the product(s) using the type of reaction as a model Balance it

Dont forget about the diatomic elements! (BrINClHOF) For example, Oxygen is O2 as an element. In a compound, it cant be a diatomic element because its not an element anymore, its a compound! 1. Synthesis reactions Synthesis reactions occur when two substances (generally elements) combine and form a compound. (Sometimes these are called combination or addition reactions.) reactant + reactant 1 product Basically: A + B AB

Example: 2H2 + O2 2H2O Example: C + O CO 2 2 Synthesis Reactions Here is another example of a synthesis reaction Practice

Predict the products. Write and balance the following synthesis reaction equations. Sodium metal reacts with chlorine gas Na(s) + Cl2(g) Solid Magnesium reacts with fluorine gas Mg(s) + F2(g) 2. Decomposition Reactions Decomposition reactions occur

when a compound breaks up into the elements or in a few to simpler compounds 1 Reactant Product + Product In general: AB A + B Example: 2 H O 2H + O 2 2 2 Example: 2 HgO 2Hg + O2 Decomposition Reactions

Another view of a decomposition reaction: Decomposition Exceptions Carbonates and chlorates are special case decomposition reactions that do not go to the elements. Carbonates (CO32-) decompose to carbon dioxide and a metal oxide Example:

CaCO3 CO2 + CaO Chlorates (ClO3-) decompose to oxygen gas and a metal chloride Example: There 2 Al(ClO3)3 2 AlCl3 + 9 O2 are other special cases, but we will not explore those in Chemistry I

Practice Predict the products. Then, write and balance the following decomposition reaction equations: Solid Lead (IV) oxide decomposes PbO2(s) Aluminum nitride decomposes AlN(s) Practice Identify the type of reaction for each of the following synthesis or

decomposition reactions, and write the balanced equation: Nitrogen monoxide N2(g) + O2(g) BaCO3(s) Co(s)+ S(s) (make Co be +3) NH3(g) + H2CO3(aq) NI3(s) 3. Single Replacement Reactions Single Replacement Reactions occur when one element replaces another in a

compound. A metal can replace a metal (+) OR a nonmetal can replace a nonmetal (-). element + compound element + compound A + BC AC + B (if A is a metal) OR A + BC BA + C (if A is a nonmetal) (remember the cation always goes first!) When H2O splits into ions, it splits into H+ and OH- (not H+ and O-2 !!)

Single Replacement Reactions Another view: Single Replacement Reactions Write and balance the following single replacement reaction equation: Zinc metal reacts with aqueous hydrochloric acid 2 Zn(s) + HCl(aq) ZnCl2 + H2(g)

Note: Zinc replaces the hydrogen ion in the reaction Single Replacement Reactions Sodium chloride solid reacts with fluorine gas 2 2 NaCl(s) + F2(g) NaF(s) + Cl2(g) Note that fluorine replaces chlorine in the compound Aluminum metal reacts with aqueous

copper (II) nitrate Al(s)+ Cu(NO3)2(aq) 4. Double Replacement Reactions Double Replacement Reactions occur when a metal replaces a metal in a compound and a nonmetal replaces a nonmetal in a compound Compound + compound compound+ compound AB + CD AD + CB Double Replacement Reactions Think about it like foiling in algebra, first and last ions go together + inside

ions go together Example: AgNO3(aq) + NaCl(s) AgCl(s) + NaNO3(aq) Another example: 2 K2SO4(aq) + Ba(NO3)2(aq) KNO3(aq) + BaSO4(s) Practice Predict the products. Balance the

equation 1. HCl(aq) + AgNO3(aq) 2. CaCl2(aq) + Na3PO4(aq) 3. Pb(NO3)2(aq) + BaCl2(aq) 4.

FeCl3(aq) + NaOH(aq) 5. H2SO4(aq) + NaOH(aq) 6. KOH(aq) + CuSO4(aq) 5. Combustion Reactions Combustion

reactions occur when a hydrocarbon reacts with oxygen gas. This is also called burning!!! In order to burn something you need the 3 things in the fire triangle: 1) A Fuel (hydrocarbon) 2) Oxygen to burn it with 3) Something to ignite Combustion Reactions

In general: CxHy + O2 CO2 + H2O Products in combustion are ALWAYS carbon dioxide and water. (although incomplete burning does cause some by-products like carbon monoxide) Combustion is used to heat homes and run automobiles (octane, as in gasoline, is C8H18)

Combustion Reactions Edgar Allen Poes drooping eyes and mouth are potential signs of CO poisoning. Combustion Example

C5H12 +8 O2 5 CO2 +6 H2O Write the products and balance the following combustion reaction: C10H22 + O2 Mixed Practice 1. State the type, predict the products, and balance the following reactions: BaCl2 + H2SO4

2. C6H12 + O2 3. Zn + CuSO4 4. Cs + Br2 5. FeCO3

Total Ionic Equations (HONORS ONLY) Once you write the molecular equation (synthesis, decomposition, etc.), you should check for reactants and products

that are soluble or insoluble. We usually assume the reaction is in water We can use a solubility table to tell us what compounds dissolve in water. If the compound is soluble (does dissolve in water), then splits the compound into its component ions If the compound is insoluble (does NOT dissolve in water), then it remains as a compound Solubility Table Solubilities Not on the Table!

Gases only slightly dissolve in water Strong acids and bases dissolve in water Hydrochloric, Hydrobromic, Hydroiodic, Nitric, Sulfuric, Perchloric Acids Group I hydroxides (should be on your chart

anyway) Water slightly dissolves in water! (H+ and OH-) For the homework SrSO4 is insoluble; BeI2 and the products are soluble There are other tables and rules that cover more compounds than your table! Total Ionic Equations Molecular Equation: K2CrO4 + Pb(NO3)2 PbCrO4 + 2 KNO3 Soluble Soluble

Insoluble Soluble Total Ionic Equation: 2 K+ + CrO4 -2 + Pb+2 + 2 NO3- PbCrO4 (s) + 2 K+ + 2 NO3- Net Ionic Equations These are the same as total ionic equations, but you should cancel out ions that appear on BOTH sides of the equation Total Ionic Equation: 2 K+ + CrO4 -2 + Pb+2 + 2 NO3-

PbCrO4 (s) + 2 K+ + 2 NO3Net Ionic Equation: CrO4 -2 + Pb+2 PbCrO4 (s) Net Ionic Equations Try this one! Write the molecular, total ionic, and net ionic equations for this reaction: Silver nitrate reacts with Lead (II) Chloride in hot water. Molecular: Total Ionic: Net Ionic:

Recently Viewed Presentations

  • E/L/G 2300 Intermediate Emergency Operations Center Functions ...

    E/L/G 2300 Intermediate Emergency Operations Center Functions ...

    Rapid Expansion. Be prepared for Rapid Expansion: Resource requests can come from a variety of originators. Requests can go from just one or two a day, to dozens per day, or even per hour, depending on how widespread and/or catastrophic...
  • Participant Observation - Cengage

    Participant Observation - Cengage

    Confirmability assesses the connection between the conclusions drawn and the sources of data which support those conclusions. Transferability describes the level of description necessary to allow readers to determine whether the qualitative report can be applied to other topics or...
  • Bringing Automated Formal Verification to PLC Program Development

    Bringing Automated Formal Verification to PLC Program Development

    Use of formal methods to verify PLC code and its applicability to safety systems. Borja Fernández Adiego (BE-ICS) Contains Joint work of . Enrique Blanco, Jean-Charles Tournier, Daniel . Darvas and Gyula Sallai
  • Crayfish Adaptations Adult Crayfish Life Cycle Grow larger

    Crayfish Adaptations Adult Crayfish Life Cycle Grow larger

    Eggs. Tiny crayfish hatch . Grow larger exoskeletons + sheds old ones (molting) Crayfish . Life Cycle . Adult. Discuss life cycle . Tell students that crayfish have adaptations which help them survive at each stage of their life cycle.
  • Investment Accounts: Pre-tax, Post-tax and Everything in Between

    Investment Accounts: Pre-tax, Post-tax and Everything in Between

    17-343 Financial planning offered through Northeast Planning Associates, Inc. (NPA), a registered investment adviser (RIA). Securities and advisory services offered through LPL Financial (LPL), an RIA and broker-dealer (BD), member FINRA/SIPC. Credit union is not an RIA or BD. Insurance...
  • Capitolo 9 - ISEDI

    Capitolo 9 - ISEDI

    Title: Capitolo 9 Author: aa aa Last modified by: Anna Altieri Created Date: 2/2/2013 11:15:48 AM Document presentation format: Presentazione su schermo (4:3)
  • The End of WWI - Helmer

    The End of WWI - Helmer

    The "Hundred Days Offensive" Allied troops underwent secret counter-offensive attack. Thousands or soldiers and tonnes of artillery were secretly . gathered at Amiens (French railway city) Alliance was completely surprised. when they were attacked and . the Entente captured 13km...
  • Chapter 6: Air-sea interaction

    Chapter 6: Air-sea interaction

    Air-Sea Interaction by Dr. Charles Dong at ECC * * * * * * * * * * * * * * Earth's heat budget Earth maintained a nearly constant average temperature because of equal rates of heat gain and...