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7.11 Predicting Products of a Chemical Reaction

7.11 Predicting Products of a Chemical Reaction. By: Sara Palatnik and Linda Kovacs Period: 3. Combination. A new compound is formed when two or more elements or compounds are chemically combined. A + B ―› AB. Calcium + Sulfur ―› Calcium Sulfide (Ca + S ―› CaS). Decomposition.

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7.11 Predicting Products of a Chemical Reaction

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  1. 7.11Predicting Products of a Chemical Reaction By: Sara Palatnik and Linda Kovacs Period: 3

  2. Combination • A new compound is formed when two or more elements or compounds are chemically combined. A + B ―› AB Calcium + Sulfur ―› Calcium Sulfide (Ca + S ―› CaS)

  3. Decomposition • Two or more elements and/or new compounds are formed when a compound is decomposed AB —› A + B Calcium Sulfide―› Calcium + Sulfur (CaS —› Ca + S)

  4. Single-Replacement • In a solution of water an element replaces another element A + BC ―› AC + B Chlorine + Sodium Bromide —› Sodium Chloride + Bromine (Cl2 + 2NaBr ―› 2NaCl + Br2)

  5. Double-Replacement Sodium Chloride + Silver Nitrate ―› Sodium Nitrate + Silver Chloride (NaCl + AgNO3 —› NaNO3 + AgCl) • Two different compounds are formed when cations are exchanged in two ionic compounds. A⁺B⁻ + C⁺D⁻ —› A⁺D⁻ + C⁺B⁻

  6. Combustion • The reactants include carbon, hydrogen, and oxygen • Oxygen reacts with the reactants to produce mostly carbon dioxide and water, but sometimes heat and light are a part of the products • If carbon monoxide is formed the reaction is incomplete Example: CH4 + 2O2→ CO2 + 2H2O

  7. Fun Facts!!!!!! • Most compounds that are going through decomposition, decompose in similar patterns. Knowing these patterns makes it easier to predict the products. • These compounds with patterns include carbonates, sulfates, hydroxides, and binary compounds. • Most of these compounds break down into their compound and oxygen. However, binary compounds usually break down into their elements. • Combination can also be called synthesis. • In soft drinks there is carbonic acid. This carbonic acid begins to decompose as soon as it is formed. The equation for this is: • H2CO3(aq) → H2O(l) + CO2(g)

  8. Identify which type of reaction this is: KCl + NaF ―› NaCl + KF B. Double-Replacement A. Combination C. Single-Replacement D. Decomposition

  9. Predict the unbalanced outcome of:NaCl→ _______________ A.ClNa B. NaCl2 C. Na + Cl2 D. Na + Cl

  10. Homework:Predict Each Outcome and then Balance Each Equation • K + O2 → ______________ • Ca3N2 → _______________ • NaCl + K → __________ • NaCl + LiBr → ___________ Fun, helpful website to visit: http://www.factmonster.com/cig/chemistry/predicting-reaction-products.html

  11. Thank You for Watching!

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