Aktivita CLIL Chemie III. Škola: Gymnázium Bystřice nad Pernštejnem Jméno vyučujícího: Mgr. Marie Dřínovská Název aktivity: Balancing equations vyčíslování chemických rovnic Předmět: Chemie Ročník, třída: kvinta Jazyk a jazyková úroveň žáků: angličtina A1+ Datum realizace: 27.3.2018 Forma realizace: samostatná práce s následnou kontrolou ve dvojici Stručný popis aktivity: žáci se pokusí pracovat se známou problematikou v anglické verzi Použité metody: práce s textem, porozumění zadání Použité pomůcky: pracovní listy, Časová náročnost: 15 min Postup realizace: Žáci kapitolu o vyčíslování chemických rovnic znají z nižších ročníků. Jsou schopni intuitivně pochopit zadání v krátkém testu. Teoretický popis v úvodu pracovního listu anglicky popisuje pro žáky známé skutečnosti. Pochopení tedy není náročné. Příloha: pracovní list + řešení
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Fill in the gaps with the correct words. Not every word is used. elements atoms number products state one three sides When you are balancing the equation, you firstly write down the correct formula of the reactants and. After that, you check the number of of each element on both of the equation. You can now balance the equation by placing a in front of the formula of the substances in the equation. The number is not written. Lastly, you have to include the symbols in the equation. Choose just one correct answer: A, B, C or D. 1. What is the best meaning of the symbol in an equation? A. is formed from B. reacts to form C. will become D. will make 2. What do the symbols (s), (l) and (g) represent? A. how reactive the chemicals are B. the state symbols of the chemicals C. the structure of the chemicals D. the type of bonding in the chemicals 3. Which equation is correctly balanced? A. 2Na(s) + Cl2(g) 2NaCl(s) B. 2Na(s) + Cl2(g) Na2Cl2(s) C. Na(s) + Cl(g) NaCl(s) D. Na(s) + Cl2(g) NaCl2(s) 4. What are the values of a, b, and c in the following equation for the reaction of sulfur dioxide and oxygen creating a sulfur trioxide. aso2 + bo2 cso3 A. a= 1; b= 1; c= 1 B. a= 1; b= 2; c= 2
C. a= 2; b= 1; c= 2 D. a= 2; b= 2; c= 1 Balance the equations above. There is no need to put a numer in every space. 1. H2(g) + O2(g) H2O(l) 2. C(s) + CO2(g) CO (g) 3. Cl2(g) + KBr(aq) Br2(l) + KCl (aq) 4. N2(g) + H2(g) NH3(g) 5. CH4(g) + O2(g) CO2(g) + H2O(g) 6. CuO(s) + NH3(g) Cu(s) + H2O(l) + N2(g)
When you are balancing the equation, you firstly write down the correct formula of the reactants and the products. After that, you check the number of atoms of each element on both sides of the equation. You can now balance the equation by placing a number in front of the formula of the substances in the equation. The number one is not written. Lastly, you have to include the state symbols in the equation. 1. What is the best meaning of the symbol in an equation? A. is formed from B. reacts to form C. will become D. will make 2. What do the symbols (s), (l) and (g) represent? A. how reactive the chemicals are B. the state symbols of the chemicals C. the structure of the chemicals D. the type of bonding in the chemicals 3. Which equation is correctly balanced? A. 2Na(s) + Cl2(g) 2NaCl(s) B. 2Na(s) + Cl2(g) Na2Cl2(s) C. Na(s) + Cl(g) NaCl(s) D. Na(s) + Cl2(g) NaCl2(s) 4. What are the values of a, b, and c in the following equation for the reaction of sulfur dioxide and oxygen creating a sulfur trioxide. aso2 + bo2 cso3 A. a= 1; b= 1; c= 1 B. a= 1; b= 2; c= 2 C. a= 2; b= 1; c= 2 D. a= 2; b= 2; c= 1
1. 2H2(g) + O2(g) 2 H2O(l) 2. C(s) + CO2(g) 2 CO (g) 3. Cl2(g) + 2 KBr(aq) Br2(l) + 2 KCl (aq) 4. N2(g) + 3 H2(g) 2 NH3(g) 5. CH4(g) + 2 O2(g) CO2(g) + 2 H2O(g) 6. 3 CuO(s) + 2 NH3(g) 3 Cu(s) + 3 H2O(l) + N2(g)