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Writing and Balancing Chemical Equations

Writing and Balancing Chemical Equations. Chem -To-Go Lesson 20 Unit 5. Chemical reactions. Process by which the atoms of one or more substances are rearranged to form different substances Law of Conservation of Matter – Matter is not created or destroyed during a chemical reaction.

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Writing and Balancing Chemical Equations

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  1. Writing and Balancing Chemical Equations Chem-To-Go Lesson 20 Unit 5

  2. Chemical reactions • Process by which the atoms of one or more substances are rearranged to form different substances • Law of Conservation of Matter – Matter is not created or destroyed during a chemical reaction.

  3. Writing a Chemical Equation Sodium permanganate reacts with magnesium chlorite to produce sodium chlorite and magnesium permanganate. • Read a description of the reaction • Note what is reacted with what • Note what is yielded or produced • Write formulas for each compound • Use + to represent “and” • Use  to represent “produces” or “yields” • Include states of matter where available • (s) solid • (l) liquid • (g) gas • (aq) dissolved in water

  4. Writing a Chemical Equation Solid iron reacts with oxygen gas to produce solid iron (III) oxide. • Read a description of the reaction • Note what is reacted with what • Note what is yielded or produced • Write formulas for each compound • Use + to represent “and” • Use  to represent “produces” or “yields” • Include states of matter where available • (s) solid • (l) liquid • (g) gas • (aq) dissolved in water

  5. Balancing a Chemical Equation • Write the skeleton equation. • BE SURE THE FORMULAS ARE WRITTEN CORRECTLY. • Inventory reactants • Inventory products • Insert coefficients to make atoms of each element equal on both sides of the equation • Reduce the coefficients if possible NaMnO4 + Mg(ClO2)2 NaClO2 + Mg(MnO4)2

  6. Balancing a Chemical Equation Fe(s) + O2(g)  Fe2O3(s) • Write the skeleton equation. • BE SURE THE FORMULAS ARE WRITTEN CORRECTLY. • Inventory reactants • Inventory products • Insert coefficients to make atoms of each element equal on both sides of the equation • Reduce the coefficients if possible

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