Names and Formulas of Binary Molecular Compounds A binary molecular compound is a compound composed of atoms of two different elements, usually two non-metals,

Slides:



Advertisements
Similar presentations
Atomic Theory Atoms are building blocks of elements
Advertisements

Chemical Formulas and Equations
What is a Chemical Reaction?
CH9 Chemical Reactions.
reactant entities are on left side and change into
In written names and formulas for ionic compounds, the cation appears first, followed by the anion. Section 3: Names and Formulas for Ionic Compounds K.
Chapter 9 Chemical Reactions. 9.1: Reactions & Equations Objectives Recognize evidence of chemical change Represent chemical reactions with equations.
Chemistry Notes: Chemical Reactions Chemistry
Chapter 8 Chemical Reactions What is a chemical equation? C + O 2 → CO 2.
4.3 Balancing Chemical Equations
(c) McGraw Hill Ryerson Balancing Chemical Equations Chemical reactions result in chemical changes.  Chemical changes occur when new substances.
Presentation title slide
Chemistry Chapter 10 Notes #1. Covalent Compounds -Review  Common Diatomic molecules Hydrogen (gas), Oxygen, Nitrogen, Fluorine, Chlorine, Bromine, Iodine.
Balancing Chemical Equations Chapter 7. What is Balancing? Making sure there are equal numbers of each type of atom on each side of a chemical reaction.
Atoms and Periodic Table Review
Developing Chemical Equations
Chemistry Unit 2 ( ) What is an ion? Define ionic bond.
BALANCING CHEMICAL EQUATIONS
Law of Conservation of Mass Law of Conservation of Mass: Mass is neither created nor destroyed during a chemical reaction- it is conserved Mass reactants.
Describing Chemical Change. Objectives Identify, define, and explain: chemical equation, chemical statement, catalyst, coefficient, balanced equation,
Chemical Names and Formulas
Chemical Reactions. Chemical Reaction _______________ – process by which the atoms of one or more substance are rearranged to form different substances.
Notes – Chemical Equations Chapter 8, Lesson 2. Conservation of Mass When the end of the last period bell rang, everyone moved to a new room, and ended.
Describing Chemical Reactions
Chapter 19 Oxidation-Reduction Reactions. Section 1: Oxidation and Reduction Standard 3.g.: – Students know how to identify reactions that involve oxidation.
Chemistry Ch 8 - Chemical Reactions Reactions & Equations When you take substances and rearrange their atoms to form new substances you have created.
Chapter 6 Nomenclature of Inorganic Compounds Objectives: Distinguish between common and systematic names of compounds Distinguish between common and.
Chapter 4.3 Chemical Reactions.
Chemical Reactions Chapter 7 Pg
IIIIIIIVV A Balancing Act Chemical Reactions. Chemical Reactions Take Place… n Every minute of every day both in and around you n Examples:  Digestion.
Chemical changes occur when new substances are created. The original substance(s), called reactants, change into new substance(s) called products. Copper.
4.1 Introduction to Chemical Reactions
Equations & Balancing. Outline  Word Equations  Skeleton Equations  Conservation of Mass  Balanced Chemical Equations.
SECTION 1 CHEMICAL EQUATIONS Unit 4 Chemical Reactions.
CHEMICAL REACTIONS Chapter 8. I. Forming New Substances A. chemical reactions 1. process where substances change into new substances (a chemical change)
Notes Key Points About All Chemical Reactions:  A new substance is formed NN o atoms are lost or gained during chemical reactions  atomic bonds are.
Chemical Equations. Chemical Equation: A method of representing reactants and products of a reaction by showing the formulas. Example:2H 2 + O 2 → 2H.
Chemical Reactions.
Chemical Reactions. Writing Chemical Formulas Steps for writing: 1.Decide the type of bond – a)Prefixes used– Covalent Bond b)No prefixes– Ionic 2.Write.
Science 10: Chemical Reactions.  Name and write formulae for common ionic compounds and molecular compounds and describe the usefulness of the IUPAC.
UNIT 4: Formulas and Equations (Review Book Topic 2) How can we distinguish between quantitative and qualitative information? What are the different types.
Chemical Formulas and Equations Letters form words. In the same way, chemical symbols are put together to make chemical formulas that describe substances.
Elements and Compounds of Chemistry Naming and Formulas.
Balancing Equations Balancing and writing equations.
CHEMICAL EQUATIONS & REACTIONS. Describing Reactions  What is a Chemical Reaction?  Occurs when compounds are mixed (sometimes with help)  Chemical.
Science 10: Chemical Reactions. Naming, Naming, Formula?!  Why is this important?
Chemical Reactions. In a chemical reaction: there is a change in the way atoms are joined together there is a change in the way atoms are joined together.
Chapter 7 Chemical reactions. Signs of a chemical reaction color change (ex. bleached hair, steel rusting) solid forms see bubbles heat produced (temp.
CHEMICAL SYMBOLS, FORMULAS, AND EQUATIONS Looking at water as a molecule made up of atoms, the building blocks of matter.
Get out : Balancing Work Balancing Equation Notes Finish working on Balancing DUE FRIDAY.
Balancing Chemical Equations. Recall The law of conservation of mass states that mass cannot be created nor destroyed in a chemical reaction. Chemical.
IIIIIIIVV Try on your own and write answers on the board… Daily Opener Questions.
Conservation of Mass Balancing Chemical Equations 1/19/16.
Balancing equations View on This!.
What is a chemical equation? C + O2 → CO2
OTHER MOLECULAR COMPOUNDS
Balancing Chemical Equations
Chemical Reactions: An Introduction Chapter 6
Chemical Equation A shorthand way of reporting details of a chemical reaction Reactants The starting substances in a reaction Placed on the left side of.
Balancing equations View on This!.
Law of Conservation of Mass
Balancing and writing equations
Balancing Chemical Equations
The Mole through Percent Yield
Section 3: Naming Compounds and Writing Formulas
4.3 Balancing Chemical Equations pp
Balancing Chemical Equations pp
Formula and Naming of Ionic Compounds
Chemical Reactions.
Chemical Reactions Chemical Changes.
Presentation transcript:

Names and Formulas of Binary Molecular Compounds A binary molecular compound is a compound composed of atoms of two different elements, usually two non-metals, that are joined together with covalent bonds.

Rules for naming Binary Molecular compounds UNIT 2 Chapter 3: Chemical Names, Formulas, and Equations Section ) First Element in name and formula is usually the one farther to the left on the periodic table. 2.) Suffix “-ide” attached the name of the second element. 3.) Pre-fixes used to indicate how many atoms of each type are present in one molecule of the compound. if first element is one (mono) don’t write it.

What is the name of a binary molecular compound that contains one sulfur atom and six fluorine atoms?

Exceptions to the Rules UNIT 2 Chapter 3: Chemical Names, Formulas, and Equations Section 3.2 TO PREVIOUS SLIDE Compounds that contain hydrogen are exceptions to the general naming rules. Hydrogen is a non-metal, and hydrogen chloride (HCl) is molecular compound. Binary hydrogen compounds are named as though they are ionic compounds. Compounds that contain hydrogen and carbon are also named differently. If hydrogen chloride was named according to the naming rules for molecular compounds, it would be called hydrogen monochloride. HCl

Go over sample problem on P.g. 123 as a class. Complete practice problems 9-10 on p.g. 123

IUPAC and Systematic Names UNIT 2 Chapter 3: Chemical Names, Formulas, and Equations Section 3.2 The international system for naming chemicals is maintained by the International Union of Pure and Applied Chemistry (IUPAC). IUPAC has developed a systematic method for naming chemicals according to their composition. These calcium sulfate crystals are found in Mexico. Thanks to IUPAC, scientists around the world can share information about them.

You and your group will read p.g. 124 – 125 Then you will read the article provided to you and complete the think about it 3-2F and briefly present to the rest of the class.

Think about it 3-2F 1 mark for chemical formula additional names properties interesting information 2 marks for applications Answer the three questions ( 1 mark each) Info. presented neatly, correctly, creatively (1 mark) Total ___ / 10

Why is an international system for naming chemicals important? An international system for naming chemicals ensures that scientists from all over the world can identify a chemical by its universal name and thus exchange information about their research and findings.

Key Naming Rules: A Summary UNIT 2 Chapter 3: Chemical Names, Formulas, and Equations Section 3.2

Section 3.2 Review UNIT 2 Chapter 3: Chemical Names, Formulas, and Equations Section 3.2 Chemical compounds are named according to whether they are ionic or molecular. The formula of an ionic compound represents the ratio of the positive and negative ions in the electrically neutral compound. The formula of a molecular compound represents the number of atoms of each element in a molecule of the compound. Chemical names and formulas are standardized by bodies such as the International Union of Pure and Applied Chemistry (IUPAC).

3.3 Chemical Equations and the Law of Conservation of Mass UNIT 2 Chapter 3: Chemical Names, Formulas, and Equations Section 3.3 Chemical reaction - when one or more substances (elements or compounds) change to form one or more different substances (elements or compounds). Reactants - the substances that undergo a chemical reaction Products - the substances formed in a chemical reaction What are some examples of chemical reactions that take place around you?

Word Equations UNIT 2 Chapter 3: Chemical Names, Formulas, and Equations Section 3.3 The reactants are on the left side of the arrow, and the products are on the right side of the arrow.

The Conservation of Mass in Chemical Reactions UNIT 2 Chapter 3: Chemical Names, Formulas, and Equations Section 3.3 You and your group will copy down the questions on the following slide. Next, you and your group will read p.g.130 – 132. Next you will find the answer to the question number that corresponds with your group number (ex. Group 1 answers question 1) on the next page. Your group will then present your answer to the rest of the class for their notes.

1.) Who is Antoine Lavoisier? 2.) What is the Law of Conservation of Mass? 3.) Explain the experiment performed to show the Law of Conservation of Mass. 4.) How does Dalton’s atomic theory relate to the Law of Conservation of Mass? 5.) What is a Chemical equation? What is the difference between a skeleton equation and a balanced equation? 6.) What is a Coefficient? What other information is sometimes shown in a chemical equation?

1.) French scientist from the late 1700s. Performed experiments to show the law of conservation of mass. 2.) In a chemical reaction, the total mass of the products is always the same as the total mass of the reactants. 3.) worked with mercury(II) oxide to make mercury and oxygen and measured the mass of the products and reactants and they were always the same. 4.) Atoms are not created or destroyed so every atom in the reactants are present in the products

Chemical Equations and the Law of Conservation of Mass UNIT 2 Chapter 3: Chemical Names, Formulas, and Equations Section ) Chemical equation - representation of a chemical reaction that uses chemical formulas and symbols. skeleton equation is incomplete. balanced chemical equation is complete because it takes the law of conservation of mass into consideration. 6.) A coefficient is a number placed in front of a chemical formula in a balanced equation to show how many atoms, molecules, or ions are involved in a reaction. Coefficients are used to balance a chemical equation.

Balancing Chemical Equations UNIT 2 Chapter 3: Chemical Names, Formulas, and Equations Section 3.3 TO PREVIOUS SLIDE When balancing chemical equations, write the skeleton equation and then use coefficients to balance the numbers of each kind of atom on each side of the yield arrow. When do you change the subscripts to balance a chemical equation? The skeleton chemical equation above becomes the balanced chemical equation below.

As your group read page 132. Close your textbooks. Elect one group member to be the “teacher”, and teach the rest of the group how to balance an equation using the following example H 2 O 2 (aq)  H 2 O (l) + O 2 (g) - Other group members ask question or correct when needed.

read “Tips for Writing and Balancing Chemical Equations” on p.g In your notebook create an easy to read summary (in your own words, point form) of these tips. Be prepared to hand it in at the end of class.

Complete questions on p.g Correction – 18 f.) CaCl 2 (aq) + AgNO 3 (aq)  AgCl(s) + Ca(NO 3 ) 2 Go over sample problem on P.g. 134 as a class. Homework - today Practice problems 11-13

Next class P.g. 137 #6, 8, 13, 14, 16, 17, 18.

Tips for Writing and Balancing Chemical Equations UNIT 2 Chapter 3: Chemical Names, Formulas, and Equations Section 3.3 TO PREVIOUS SLIDE Balance equations by adjusting coefficients, never by changing chemical formulas. Balance metals first. Add coefficients to any elements last. Balance hydrogen and oxygen last. They often appear in more than one reactant or more than one product, so it is easier to balance them after the other elements are balanced. If a polyatomic ion appears in both a reactant and a product, treat it as a single unit. Continued…

Tips for Writing and Balancing Chemical Equations UNIT 2 Chapter 3: Chemical Names, Formulas, and Equations Section 3.3 TO PREVIOUS SLIDE Once you think the chemical equation is balanced, do a final check by counting the atoms of each element one more time. If you go back and forth between two substances, using higher and higher coefficients, double-check each chemical formula. An error in a chemical formula might be preventing you from balancing the chemical equation. The following elements exist as diatomic molecules: hydrogen, H 2 (g); nitrogen, N 2 (g); oxygen, O 2 (g); fluorine, F 2 (g); chlorine, Cl 2 (g); bromine, Br 2 (ℓ); and iodine, I 2 (s). Always write them as shown here in a chemical equation. A diatomic molecule contains two atoms of the same element.

Section 3.3 Review UNIT 2 Chapter 3: Chemical Names, Formulas, and Equations Section 3.3 TO PREVIOUS SLIDE In a chemical reaction, a reactant or reactants undergo a chemical change, forming a different substance or substances called products. Reactants and products may be elements or chemical compounds. According to the law of conservation of mass, the overall mass of the reactants is always equal to the overall mass of the products in a chemical reaction. Chemists use descriptions, word equations, and balanced chemical equations to represent chemical reactions. In a balanced chemical equation, there is always the same number of atoms of each element on each side of the equation, in accordance with the law of conservation of mass.