stoichiometry Flashcards
What is stoichiometry?
Stoichiometry is the calculation of quantities in chemical reactions.
What is a stoichiometric coefficient?
A stoichiometric coefficient is the number that appears before a compound in a balanced chemical equation.
True or False: Stoichiometry deals with the relationships between the amounts of substances in a chemical reaction.
True
What is a limiting reactant?
The limiting reactant is the reactant that is completely consumed in a chemical reaction.
What is a theoretical yield?
The theoretical yield is the maximum amount of product that can be produced in a chemical reaction.
What is actual yield?
Actual yield is the amount of product actually obtained from a chemical reaction.
What is percent yield?
Percent yield is the ratio of actual yield to theoretical yield, expressed as a percentage.
What is a molar ratio?
A molar ratio is the ratio of moles of one substance to moles of another substance in a chemical reaction.
What is Avogadro’s number?
Avogadro’s number is 6.022 x 10^23, representing the number of atoms or molecules in one mole of a substance.
What is the formula for percent yield?
Percent yield = (actual yield / theoretical yield) x 100
What is the formula for molarity?
Molarity = moles of solute / liters of solution
What is a stoichiometry problem-solving strategy?
- Write a balanced chemical equation. 2. Convert the given quantity to moles. 3. Use the mole ratio to calculate moles of the desired substance. 4. Convert moles to the desired units.
What is the law of conservation of mass?
The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.
What is a stoichiometry calculation?
A stoichiometry calculation involves determining the amounts of reactants and products in a chemical reaction.
What is a stoichiometry table?
A stoichiometry table is a visual aid used to organize information about reactants and products in a chemical reaction.
What is the formula for moles?
Moles = mass / molar mass
What is the relationship between moles and grams?
The relationship between moles and grams is determined by the molar mass of the substance.
What is the formula for molar mass?
Molar mass = sum of the atomic masses of all atoms in a molecule
What is a stoichiometry conversion factor?
A stoichiometry conversion factor is a ratio derived from the coefficients in a balanced chemical equation, used to convert between different units.
What is the law of definite proportions?
The law of definite proportions states that a chemical compound always contains the same elements in the same proportions by mass.
What is the formula for moles to liters of gas at STP?
Moles to liters of gas at STP = moles x 22.4 L/mol
What is the formula for mass percent composition?
Mass percent composition = (mass of element / total mass of compound) x 100
What is stoichiometry used for?
Stoichiometry is used to predict the amounts of reactants and products in a chemical reaction.
What is the formula for grams to moles conversion?
Grams to moles = grams / molar mass
