Ch3Templates

Ch3Templates - Chemistry 1201 Chapter 3 Stoichiometry:...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Chem 1201 - E. Cook 33 Chapter 3 Stoichiometry: Calculations with Chemical Formulas and Equations Performance goals : 1. Know the meaning of the new terms in the chapter (chemical equation, reactants, products, aqueous solution, law of conservation of mass, stoichiometry, stoichiometric coefficients, combustion, stoichiometric factor, limiting reagent, yield). 2. Be able to balance reaction equations and interpret information a balanced chemical reaction equation carries. 3. Understand the principle of the conservation of matter. 4. Define mole, molar mass of compounds, convert moles into mass and vice versa. 5. Understand the concept of the Avogadro’s Number, convert moles and mass into numbers of particles. 6. Express molecular composition in terms of percent composition 7. Use percent composition or combustion analysis to determine empirical formula, and then molar mass to establish the molecular formula. 8. Be able to determine the limiting reagent (reactant) and understand its importance in determining the amount of product(s). 9. Explain the differences between theoretical, actual and percent yields. Recommended End-of-Chapter Questions from Ch. 3: (11 th ed.): 1-13, 15, 17, 19-21, 23, 25, 27, 29, 33-35, 37, 39, 43-45, 47, 49, 51, 57-62, 71, 73, 75, 77, 93, 97. (10 th ed.): 1-7, 13, 17, 21, 23, 29, 33, 35, 39, 43, 45, 47, 49-51, 53, 57, 61, 63, 71, 73, 75, 77, 79, 86, 92. Chemistry 1201
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Chem 1201 - E. Cook 34 Reactants products 2 CO(g) + O 2 (g) 2 CO 2 (g) C 3 H 8 (g) + 5 O 2 (g) 3 CO 2 (g) + 4 H 2 O( l ) HCl(g) + H 2 O( l ) H 3 O + (aq) + Cl - (aq) (g) gas (s) solid ( l ) liquid (aq) aqueous solution (ie. made with water as a solvent) Law of Conservation of Matter You must have the same number of atoms of each type on both sides of the equation The total mass of reactants = The total mass of products Matter can neither be created nor destroyed Note : Balancing of a reaction equation ensures that the Law of Conservation of Matter is adhered to. C 3 H 8 (g) + 5 O 2 (g) 3 CO 2 (g) + 4 H 2 O( l ) 3 C atoms 8 H atoms 10 O atoms 204.659 g 3 C atoms 8 H atoms 10 O atoms 204.659 g Chemical Equations (3.1)
Background image of page 2
Chem 1201 - E. Cook 35 How do we balance reactions? - by inspection (trial and error) Always make 100% sure that all the formulas are CORRECT!!! C 6 H 6 ( l ) + O 2 (g) CO 2 (g) + H 2 O(g) use the smallest whole numbers as stoichiometric coefficients !!! C 6 H 6 ( l ) + O 2 (g) CO 2 (g) + H 2 O(g) Always check all the atoms once more! P 4 (s) + Cl 2 (g) PCl 3 ( l ) Home: Balance the following reaction equations (compare your results with other students for correctness): 1. C 4 H 10 (g) + O 2 (g) CO 2 (g) + H 2 O (g) 2. C 2 H 5 OH(l) + O 2 CO 2 (g) + H 2 3. CaO(s) + NH 4 Cl(s) NH 3 (g) + H 2 O(l) + CaCl 2 (s) 4. Cr 2 O 3 (s) + Si(s) Cr(s) + SiO 2 5. Ag(s) + H 2 S(g) + O 2 Ag 2 S(s) + H 2 O(g) 6. CH 4 (g) + Cl 2 CHCl 3 (l) + HCl(g) 7. HNO 3 (aq) + CaCO 3 Ca(NO 3 ) 2 (aq) + CO 2 (g) + H 2 O(l) 8. NH 3 + O 2 NO 2 + H 2 Combination: A + B C 2 S(s) + 3 O 2 (g) 2 SO 3 (g) Decomposition: C A + B CaCO 3 (s) CaO(s) + CO 2 (g) Combustion in air (a.k.a. burning, oxidation) C 3 H 8 (g) + 5 O 2 (g) 4 H 2 O(g or l ) + 3 CO 2 (g) Some Simple Patterns of Chemical Reactivity (3.2)
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Chem 1201 - E. Cook 36 The Mole (3.3–3.4) We say: 1 mole of sodium contains 6.022 • 10 23 atoms of Na 1 mole of carbon dioxide contains 6.022 • 10 23 molecules of CO 2 1 mole of sodium chloride contains 6.022 • 10
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 26

Ch3Templates - Chemistry 1201 Chapter 3 Stoichiometry:...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online