Apresentação: Roteiro Prático e Passo a Passo da Estequiometria

Section role: supports the section on formalizing the stoichiometric calculation while the teacher guides students through the step-by-step resolution of chemical proportions. Slides: (1) Title — 'A Lógica do Cálculo Estequiométrico: Da Receita à Realidade'; (2) Conectando o Desafio — bullets: recap of the ammonia factory problem, why simple mass addition failed, the need for a standardized unit (mol); (3) O Conceito de Massa Molar — bullets: definition of g/mol using the periodic table, example with Nitrogen (N2 = 28 g/mol) and Hydrogen (H2 = 2 g/mol); (4) Passo 1: Escrever e Balancear a Equação — bullets: visual of N2 + 3 H2 -> 2 NH3, the importance of correct stoichiometric coefficients; (5) Passo 2: A Proporção em Mols — bullets: reading the balanced equation as a recipe in moles (1 mol of N2 reacts with 3 mols of H2 to yield 2 mols of NH3); (6) Passo 3: Conversão e Regra de Três — bullets: converting mass to mols, setting up the proportion for unknown quantities, step-by-step mathematical setup; (7) Reagente Limitante vs. Excesso — bullets: visual identification of the limiting reactant, addressing common student misconceptions from the previous activity; (8) Resumo do Roteiro — bullets: the 4-step master list for any chemical calculation; Closing slide: 'Como você aplicaria este roteiro de 4 passos para descobrir quanto produto sobra quando há excesso de reagente?' — hands control back to the teacher to transition into individual performance verification.

Lara da Teachy