What are the general steps for solving stoichiometry problems?
1. Balance the chemical equation. 2. Identify the given measurement. 3. Convert grams to moles. 4. Use the mole ratio. 5. Convert to the desired units. 6. Double-check your units.
Describe the steps to convert grams of a reactant to liters of a product at STP.
1. Convert grams of reactant to moles using molar mass. 2. Use the mole ratio to find moles of product. 3. Convert moles of product to liters using the molar volume at STP (22.4 L/mol).
What is the effect of using an unbalanced equation in stoichiometry calculations?
Incorrect mole ratios, leading to incorrect results.
What is the effect of not converting grams to moles before using mole ratios?
Incorrect calculation of the amount of product formed or reactant needed.
Define 'stoichiometry'.
The quantitative relationship between reactants and products in a chemical reaction.
What is a 'mole'?
The chemist's counting unit; 1 mole = 6.022 x 10^23 particles (Avogadro's number).
Define 'stoichiometric coefficients'.
The numbers in front of each chemical formula in a balanced equation; they give us the mole ratios.
What is 'molar mass'?
The mass of one mole of a substance (g/mol), found on the periodic table.
Define 'molar volume'.
At STP, 1 mole of any gas = 22.4 L.
What is a 'mole ratio'?
The conversion factor that links different substances in a reaction, derived from the coefficients in the balanced equation.
