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Chemical and word equations

Chemical and word equations. Chemical equation is the expression that explains a chemical reaction using symbols. Word equation is the expression that you obtain when you read a chemical equation. next. Chemical and word equations. Example #1. This is a chemical equation:

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Chemical and word equations

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  1. Chemical and word equations • Chemical equation is the expression that explains a chemical reaction using symbols. • Word equation is the expression that you obtain when you read a chemical equation. next

  2. Chemical and word equations Example #1 This is a chemical equation: 2Al(OH)3 (s) + 3 H2S(g) Al2 S3 (aq) + 6H2O (l) This is a word equation: Two molecules of aluminum hydroxide, solid + 3 molecules of hydrosulfic acid, gas, produce one molecule of aluminum sulfide aqueous + six molecules of water liquid. next

  3. Chemical and word equations Do you see the difference? yes no next

  4. 3. Word Chemical Chemical and word equations For the following questions click on the Word or Chemical, depending on the type of equation that the term corresponds to. 1. Amonium hydroxide WordChemical 2. React WordChemical 4. (g) WordChemical 5. Solid WordChemical done

  5. Great !!!! next

  6. TRY AGAIN ! next

  7. Chemical and word equations 1. Write in your notebook the answers for the following questions and then check your answers. next

  8. Chemical and word equations Back to the equations INSTRUCTIONS: using the equations from example #1, answer the following questions. I don’t know • What’s the name of the name of the reactants in the reaction? • What’s the name of the name of the reactants in the reaction? • Is there any reactant in the gas state? Name it. • What’s the name of the name of the reactants in the reaction? • Is there any reactant in the gas state? Name it. • Which is the physical state of Aluminum hydroxide? • What’s the name of the name of the reactants in the reaction? • Is there any reactant in the gas state? Name it. • Which is the physical state of Aluminum hydroxide? • How many atoms of Hydrogen take place in the reaction? • What’s the name of the name of the reactants in the reaction? • Is there any reactant in the gas state? Name it. • Which is the physical state of Aluminum hydroxide? • How many atoms of Hydrogen take place in the reaction? • How many atoms of oxygen form the Aluminum hydroxide? • What’s the name of the name of the reactants in the reaction? • Is there any reactant in the gas state? Name it. • Which is the physical state of Aluminum hydroxide? • How many atoms of Hydrogen take place in the reaction? • How many atoms of oxygen form the Aluminum hydroxide? • Which is the formula for Aluminum sulfide? Next question

  9. Chemical and word equations Back to the equations INSTRUCTIONS: using the equations from example #1, answer the following questions. I don’t know • What’s the name of the reactants in the reaction? • Is there any reactant in the gas state? Name it. • Which is the physical state of Aluminum hydroxide? • How many atoms of Hydrogen take place in the reaction? • How many atoms of oxygen form the Aluminum hydroxide? • Which is the formula for Aluminum sulfide? • Is there any heat in the reaction? How did you know it? Check answer finish

  10. Chemical and word equations answers • aluminum hydroxide and hydrosulfic acid. • hydrosulfic acid • Solid • 12 • 3 • Al2S 3 • NO, as the symbol is not in the equation. Back to exercise finish

  11. This is a chemical equation: 2Al(OH)3 (s) + 3 H2S(g) Al2 S3 (aq) + 6H2O (l) Chemical and word equations This is a word equation: Two molecules of aluminum hydroxide, solid + 3 molecules of hydrosulfic acid, gas, produce one molecule of aluminum sulfide aqueous + six molecules of water liquid. Back to exercise

  12. This is a chemical equation: 2Al(OH)3 (s) + 3 H2S(g) Al2 S3 (aq) + 6H2O (l) Chemical and word equations This is a word equation: Two molecules of aluminum hydroxide, solid + 3 molecules of hydrosulfic acid, gas, produce one molecule of aluminum sulfide aqueous + six molecules of water liquid. Back to exercise

  13. Chemical and word equations Example #2 This is a chemical equation: 3NaHCO3 (s) + 3 HCOOH (aq) 3 NaCOOH(aq) + 3H2O (l) + 3CO2(g) This is a word equation: Three molecules of sodium acid sulfate solid + three molecules of acetic acid aqueous react to produce three molecules of sodium carbonate aqueous + three molecules of water liquid + three molecules of carbon dioxide. next

  14. In the word equation, you name all the compounds, with the coefficient as the number of molecules. The subscripts are never mentioned, they tell us about the number of atoms of an element in a molecule. The physical state, is given by the letter in parenthesis, and the word react, is used as well as produce or yield to indicate the reaction arrow. TIP* In order to know the names of the compounds, look for the name of at least one of the elements in the compound, and if it’s a reactant of product. Chemical and word equations Back to example Back to exercise

  15. Chemical and word equations Symbols: Heat Gas Liquid Solid Aqueous (dissolved in water) Reaction Reversible reaction Evaporates Settlets down, precipitates (g) (l) (s) (aq) Back

  16. Back to the class

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