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Chem 107 Exam 1
| Term | Definition |
|---|---|
| corrosives | cause severe, irreversible damage to human tissue |
| corrosives symbol | test tube pouring chemicals on metal and a hand |
| sensitizers | severe allergic reactions (irritant to skin, eyes, or respiratory tract) |
| sensitizers symbol | exclamation mark |
| carcinogens/mutagens/reproductive toxins | carcinogen - cause cancer mutagen - cause mutations reproductive toxins - birth defects |
| carcinogens/mutagens/reproductive toxins symbol | person with exploding heart |
| irritants | damage tissue (less severe than corrosives) |
| irritants symbol | exclamation mark |
| acute toxicity | cause illness and death and are very dangerous |
| acute toxicity symbol | skull and crossbones (for fatal or extremely dangerous) exclamation point (harmful) |
| flammables | light on fire easily |
| flammable symbol | fire |
| oxidizers | can contribute oxygen to a fire, accelerants |
| oxidizers symbol | circle with flame around/above it |
| toxic to aquatic life | damage the environment if exposed improperly |
| toxic to aquatic life | tree and dead fish |
| more concentration | more absorbance |
| longer path lengths | more absorbance |
| ratio 1 | 1 NaOCl + 1 Na2SO3 |
| ratio 2 | 3 NaOCl + 1 KI |
| ratio 3 | 4 NaOCl + 1 Na2S2O3 + 2 NaOH + 2 Na2SO4 |
| absorbance is inversely proportional to | transmittance |
| delta H = | -(mcAT)/nrxn top are all from the solution n is moles of reaction |
| beer's law | A = Ecl |
| %error | (actual - theoretical)/theoretical x100% |
| collision theory | a) collide b) with enough energy c) in the correct orientation |
| a) collide is affected by | temperature - molecules move faster and collide more often substrate - more molecules, more bumping and colliding |
| b) energy is effected by | temperature - molecules move faster, more collisions, more exceed activation energy, reaction rate increases |
| c) orientation is effected by | catalysts - hold reactants in correct position and bring them closer together |
| arrhenius equation | k=Ae (-Ea/RT) lnk = -Ea/RT + lnA |
| 0 order | A vs t negative slope |
| 1 order | ln A vs t negative slope |
| 2 order | 1/A vs t positive slope |
| Qexperiment = | (distance from nearest neighbor) / (range of all data) |
| Qexperiment > Q critical | is an outlier, delete it |
| Qexperiment < Qcritical | not an outlier, keep the data |
| us Q critical at ___ % | 90% |
| dilution equation | C1V1 = C2V2 |
| activation energy | amount of energy required for a substance/mole of a molecule to react |
| rate= | C/t |
| C= | A/El |
| t= | -b/m |
| nrxn= | moles of limiting reactant/coefficient of limiting reactant |
| hydrogen peroxide equation | 2H2O2 (aq) -->2 H2O (l) + O2 (g) |
| how to get an F on pasteur pipet | turn it upside down |
| read from the _____ of the meniscus | bottom |
| how to get an F while heating test tubes | touching with your hands |
| how to get an F in measuring pH | touch the tip of your pipet to the paper |
| you must have a ______ in the centrifuge | counterbalance |
| decanting | only removing the supernatant from the solution (don't touch the precipitate) |
| when measuring mass 1. 2. | 1. always tare it to get just mass, not the container 2. remove the container before adding on the mass (spills can damage the balance and/or your reading) |
| always wear 1. 2. 3. 4. 5. | safety goggles long pants closed toed shoes lab coat hair back |
| dispose of glass in | the ceramic crocks provided for glass disposal |
| no ____ or _____ in lab store ____ and ______ in lockers outside | food, water coats, backpacks |
| unwanted lab materials (liquid and solid waste) containers are located in | the fume hood |
| before you leave lab you must 1. 2. 3. | dispose of chemicals in correct waste area spray down you desk with sanitizer wash your hands with soap and water |
| chemicals stored in fume hood should always be kept in | fume hood |
| spill on hand? | run skin under sink for 15 min |
| spill in eyes/on face? | use eyewash station for 15 min |
| spill on coat? | replace it |
| spill on clothes or body? | remove clothes, wash in body shower, get new clothes |
| do not touch _____ or _______ with gloves on | faucets, door knobs |
Created by:
anyasalmon