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Chem 10Stoichiometry
Chemistry terms/concepts associated with equation stoichiometry.
| Question | Answer |
|---|---|
| The math relationships between amounts of reactants and products derived from balanced equations is called _?_. | stoichiometry |
| Name of the reactant that runs out first in a reaction? | limiting reactant |
| Name of the reactant that has more than is needed so some is left over? | excess reactant |
| What is the name of the amount of product that should be formed based on stoichiometry calculations? | theoretical yield |
| What is the name of the mount of product that is collected when the lab is performed? | actual yield |
| You can use the ratio of how much product is collected compared to how much should have been collected to calculate what quantity? | percent yield |
| What is the name of the process of performing conversions that is unit-driven (using 'railroad tracks')? | factor-label method |
| How many steps are in a mole - mole problem grid? | 2 |
| How many steps are in a mass - mass problem grid? | 4 |
| How many steps are in a mass - gas volume (or vice versa) problem grid? | 4 |
| How many 4-step grids are needed when performing an excess-limiting problem which asks for amount of excess reactant leftover? | 3 |
| Is the limiting reactant always the reactant with the smaller mass? | no |
| When can the percent yield be higher than 100% | never... such an answer indicates some error has occurred |
| Which step in a 4-step grid uses coefficients from the balanced equation? | 3rd |
| How does the instructor who made this study stack want students to round atomic masses ? | nearest 0.1 (tenth) |
| In a 4-step grid, the # that goes with 'mol' in steps 2 and 4 is always... | 1 |
| For an excess-limiting double replacement reaction, both reactants should be solved for which product? | the precipitate... it is followed by (s) |
| What is molar volume of a gas at STP? | 22.4 L |
| How many steps are in a gas volume - gas volume problem grid? | 2 |
| What quantities are always conserved in a balanced equation? | mass and atoms |
| What is conserved in this equation? H2(g) + Cl2(g) --> 2 HCl(g) | mass, atoms, moles, and volume |
| What is the mole ratio of carbon dioxide to water in this equation? 6CO2(g) + 6H2O(l) –––> C6H12O6(s) + 9O2(g) | 6 : 6 (do not reduce to 1 : 1) |
| What is the name for the process of canceling units in factor-label grids? | dimensional analysis |
| What is standard temperature on the Celsius scale? | 0 (zero) |
| What is standard pressure in atmospheres of pressure? | 1 (one) |
| Standard pressure is the average pressure exerted by the atmosphere over a long time at what location? | sea level |
| For a compound to be a precipitate, how must it be labelled on a solubility table? | I (Insoluble) |
Created by:
goakley
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