Stoichiometry

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What is Stoichiometry?

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Stoichiometry is the branch of chemistry that deals with the calculation of reactants and products in chemical reactions based on the conservation of mass.

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What is a Limiting Reactant?

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A limiting reactant is the substance that is completely consumed in a chemical reaction, limiting the amount of product that can be formed.

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What is an Excess Reactant?

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An excess reactant is a substance that is not completely used up in a chemical reaction, remaining after the reaction has completed.

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How do you identify the Limiting Reactant in a reaction?

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To identify the limiting reactant, compare the mole ratio of the reactants used in the reaction to the mole ratio in the balanced equation.

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What is the formula for calculating % Yield?

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% Yield = (Actual Yield / Theoretical Yield) x 100.

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What is Theoretical Yield?

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Theoretical yield is the maximum amount of product that can be produced from a given amount of reactants, based on stoichiometric calculations.

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What is Actual Yield?

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Actual yield is the amount of product that is actually obtained from a chemical reaction, which is often less than the theoretical yield.

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What does it mean if a reaction has a % yield greater than 100%?

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A % yield greater than 100% indicates that there was an error in measurement or calculation, as it is impossible to produce more product than theoretically possible.

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What is the role of coefficients in a balanced chemical equation?

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Coefficients indicate the relative number of moles of each substance involved in the reaction, which is essential for stoichiometric calculations.

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How do you convert grams to moles?

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To convert grams to moles, use the formula: Moles = Mass (g) / Molar Mass (g/mol).