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30 Cards in this Set
- Front
- Back
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What are hot plate stirrers used for? |
heating, stirring, both |
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Boiling Chip example |
silicon dioxide |
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When to use Boiling chip v. Boiling stick |
Stick: if it needs to be taken out chip: if it can stay in |
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bunsen burner |
yellow Flame= not enough air Open air control collar until flame becomes blue |
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graduated cylinders |
two decimals. |
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Percent Error |
(measured-accepted/ accepted)x100 |
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1 atm |
=760 torr =760 mmHg |
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hydrate |
compounds that have water molecules loosely bound within their crystal structure
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anhydrous |
no water bound in crystal
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How to obtain anhydrous salt |
boil hydrate, solid formed after |
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hygroscopic/deliquescent crystal |
absorbs water vapor from atmosphere very easily |
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effloresecent crystal |
powdery crust as it loses waters oh hydration |
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desiccant |
anhydrous crystal that will absorb water vapor from atmosphere |
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Percent H2O in Hydrate |
(mass of H20 lost/mass of hydrate sample)x100 |
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Bunsen burner order |
match first then gas. |
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limiting reagent |
reagent used up first |
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theoretical yield |
max amount of product from limiting reagent |
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percent yield |
percent of product formed. |
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When to use desiccator |
-provide dry atmosphere when cooling a substance -keep substance from picking up moisture from surroundings |
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Molarity |
moles of solute/liters of solution |
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Limiting reagent calculation |
1. Balance 2. moles of reagent 3.moles of product |
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theoretical yield |
1. moles of product to grams of product |
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electrolytes |
ionic compounds that dissolve in H2O |
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Solubility depends on |
-temp -attractive forces |
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Boyle's law |
P1V1= P2V2 |
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Charles' Law |
P1/V1=P2/V2 |
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Avagadros Law |
V1/n1=V2/n2 |
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Ideal Gas law |
PV=nRT |
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Daltons law of partial pressures |
Ptotal= P1+P2... |
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molar volume |
volume of gas/moles of gas |
