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Calc Chem Equations
| Term | Definition |
|---|---|
| Stoichiometry | The area of chemistry that deals with quantitative relationships among reactants and products |
| Molar mass | The sum of the atomic masses of all atoms in at element or compound |
| Mole ratio | A ratio between the number of moles of any two species involved in a chemical reaction. |
| Limiting reactant | Limits the amount of product that can be formed. |
| To identify the limiting reactant in a reaction: | - Calculate the amount of product formed for each reactant. - Determine the limiting reactant by selecting the one that gives the least amount of product. |
| Theoretical yield | The calculated amount of product that can be obtained from a given amount of reactant. |
| Actual yield | The amount of product that we finally obtain experimentally. |
| To determine the actual amount of product formed in a limiting reactant situation: | - Calculate the amount of the other reactant needed to react with the limiting reactant. - Subtract this amount from the original amount of the other reactant to find the amount of excess reactant (untracked) |
| Percent yield | - The ratio of the actual yield to the theoretical yield multiplied by 100. - Actual yield / Theoretical yield x 100 |
| Mole-Mole Calculations | Convert the moles of starting substance to moles of desired substance. |
| Mole-Mass Calculations | - Convert the moles of starting substance to moles of desired substance. - Convert the moles of desired substance to grams. |
| Mass-Mass Calculations | - Convert the quantity of starting substance to moles. - Convert the moles of starting substance to moles of desired substance. - Convert the moles of desired substance to the appropriate unit. |