Unit 6 Lesson 1 Chemical Reactions A chemical

Unit 6  Lesson 1 Chemical Reactions A chemical

Unit 6 Lesson 1 Chemical Reactions A chemical reaction is when the bonds between atoms of a substance are broken and the atoms rearrange and form new bonds to make substances. How do you know when a chemical reaction occurs? What is your evidence? Temperature change

Color Change (not color intensity) Light Gas formation Formation of Appearance of a solid (precipitate) Reactant(s)

Product(s) What is used in a reaction What is produced/made during a reaction Chemical equation Symb ol Purpose +

Separates more than one reactant or product Separates reactants from products. Indicates direction of reaction (s) (aq) Uses symbols and formulas to show what happens in a chemical reaction

Word equation calcium + oxygen calcium oxide product reactants solid dissolved in water (l) liquid (g)

gas Formula (skeleton) equation Ca + O2 CaO reactants product Law of Conservation of Mass In a chemical reaction, matter is not created or destroyed This means that you have to have the same number of each type of atom on each side of the chemical equation. After you write a chemical equation you have to

balance it to make sure that the same number of atoms of each element are on each side. TIPS Balancing Equations A coefficient is the number placed in FRONT of an element or compound. Coefficients are used to balance the number of atoms on each side. 2H O - coefficient is 2 2 When counting atoms you multiply the compound by the coefficient.

SO3 = 1 sulfur & 3 oxygen 3SO3 = 3 sulfur & 9 oxygen NEVER change subscripts for a compound or polyatomic ion Make sure all formulas are written correctly before attempting to balance Balance oxygen LAST Steps 1. Write the skeleton/formula equation. Make sure all the formulas are written correctly! CH4 + O2 CO2 + H2O 2. Complete an atom inventory

CH4 + O2 CO2 + H2O 1 4 2 C H O 1 2 3 3. Add coefficients to make the atoms balance ___CH4 + ___O

2 2 ___CO2 + ___H 2 2O 1 4 4 2 C H O 1 2 4 3 4 Practice

Write a balanced chemical equation for the reaction in which aluminum reacts with oxygen to produce aluminum oxide. 3 2 ___Al 4 2 2O3 ____Al + ___O 4 1 6 2 Al O 2 4

3 6 Write a balanced chemical equation for the reaction in which hydrochloric acid reacts with calcium carbonate to produce calcium chloride, water, and carbon dioxide. __HCl 2 + __CaCO3 __CaCl2 + __H2O + __CO2 2 1 H 2 1 Cl 1 Ca 1 C 3 O 2

2 1 1 3 __BeF2 + __ Al2O3 __ BeO+ __ AlF3 3 1 6 2 2 3 Be F Al O

1 3 3 6 12 13 3 3 2 __BeF 2 + __ Al2O3 __ BeO+ __ AlF3 __PbO + __HCl __H2O + __PbCl2 1 1

2 1 2 1 Pb O H Cl 1 1 2 2 __PbO + 2HCl __H2O + __PbCl2

Recently Viewed Presentations

  • Pre-Columbian Civilizations in the Americas

    Pre-Columbian Civilizations in the Americas

    Temple of the Masks. Tikal Jungle View at Sunset. Tikal - Main Court ... Tikal - Wall Mask of the Rain God. Mayan Glyphs. Mayan . Mathematics. sky king house child city. Mayan Glyphs. Mayan Drinking Cup for Chocolate. Pakal:...
  • AHCCCS Pharmacy and Therapeutics Committee August 16, 2016

    AHCCCS Pharmacy and Therapeutics Committee August 16, 2016

    Register to present at least 14 days prior to P&T meeting. First-come, first serve and limited to 15 total in-person public testimonies. ... Given once daily in the morning and comes in 10, 15, 20, 30, 40, 50, and 60...
  • ANCOVA

    ANCOVA

    ANCOVA vs ANOVA: Comparing change from baseline between groups in a clinical trial (using SPSS). Background: Dry Eye disease. Intact tear film essential for healthy eye. Normal film function requires . Adequate production of tears. Proper spreading and retention on...
  • The Consultation Institute Presentation to London Scrutiny Network

    The Consultation Institute Presentation to London Scrutiny Network

    Amanda Murrell 17 February 2010 www.consultationinstitute.org * * * TCI 2010 * Making Consultation Meaningful 2006 ©The Consultation Institute 2006 * Crawley BC Capability Review 12 Feb 10 MCM 08 Scotland delivery TCI08 * Making Consultation Meaningful 2006 ©The Consultation...
  • What is Go SOLAR - Welcome to Broward County!

    What is Go SOLAR - Welcome to Broward County!

    Timeline. System Development. 4th Quarter FY2012. User Testing & Training. 1st Quarter FY2013. Go Live! 2. nd. Quarter FY2013. Currently staff is working with partner cities,key stakeholders, solar industry and design professionals to develop the permitting system. During the first...
  • Creating Vector Graphics - Duquesne Media

    Creating Vector Graphics - Duquesne Media

    Begin with selecting the Rounded Rectangle tool from the Toolbar. Remember - The Shapes are all collected as a group of tools, you may have to hold and select the Rounded Rectangle tool. Use either the Toolbar or the Property...
  • Name:______________________ Date:_____________ Number:_____ Directions: Match the vocabulary word

    Name:______________________ Date:_____________ Number:_____ Directions: Match the vocabulary word

    Douglass escaped slavery by doing what? By dressing like a sailor and taking a train. By taking the Underground Railroad. By taking a boat. Douglass was friends with this woman who worked against slavery and worked for women's rights
  • Smart Business Gateway - Aria Technologies

    Smart Business Gateway - Aria Technologies

    MOH. Station Groups. Paging. 3 Way Conference. Dialing Restrictions (Class of Service) Prime Line - Immediate/Delayed(Hot line) SMDR . Authorization Codes. Mobile Extensions. Networking. DHCP Server. IP Address distribution. File Server. Print Server ... Diagnostic Tool. Set Trace Direction. Set...