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chemistry. 11.1. Writing Chemical Equations. A skeleton equation is a chemical equation that does not indicate relative amounts of reactants and products. Skeleton equation for rusting: Fe + O 2 Fe 2 O 3. 11.1. Writing Chemical Equations.
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11.1 Writing Chemical Equations • A skeleton equation is a chemical equation that does not indicate relative amounts of reactants and products. • Skeleton equation for rusting: • Fe + O2 Fe2O3
11.1 Writing Chemical Equations • A catalyst is a substance that speeds up the reaction but is not used up in the reaction.
11.1 Balancing Chemical Equations • To write a balanced chemical equation: • write the skeleton equation • use coefficients to balance so that it obeys the law of conservation of mass.
for Conceptual Problem 11.2 Problem Solving 11.6 Solve Problem 6 with the help of an interactive guided tutorial.
11.1 Section Quiz. • 11.1.
11.1 Section Quiz. • 1. Propane gas reacts with oxygen to produce water vapor and carbon dioxide. Choose the correct word equation for this reaction. • propane + carbon dioxide water + oxygen • propane + oxygen + water carbon dioxide • propane + oxygen + water + carbon dioxide • propane + oxygen water + carbon dioxide
11.1 Section Quiz. • 2. Which of the following is a skeleton equation? • H2 + CO CH3OH • 2H2 + CO CH3OH • 2H2 + CO2 CH3OH • hydrogen + carbon monoxide methanol
11.1 Section Quiz. • 3. What coefficient for H2SO4 is required to balance the following equation? • Ca3(PO4)2 + ____ H2SO4 3CaSO4 + 2H3PO4 • 1 • 2 • 3 • 4
