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AP CHEM Flashcards

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9753502863dalton's law of partial pressuresthe partial pressure of a particular ideal gas while in a mix is the same as the pressure it would have in the same container on its own0
9753502864kinetic molecular theorycan derive gas laws from basic assumptions and physics assumptions: gas molecules occupy no space, minimal interactions, perfect elastic collisions1
9753502865when is pvnrt more truelow pressure (less interaction between molecules) small molecules (molecules are closer to 0 volume)2
9753502866Vrmsroot mean square velocity yeah that image where Mm is molar mass = √(∑v²/n) where n how many particles and v is velocity of a particle velocity of particle with average energy3
9753502867KE per particle(3/2)RT = KEavg for particle4
9753502868pvnrt for moleculesPV = NkT where N is number of molecules and k is boltzmann5
9753502869boltzmann's constantR/Na = ideal gas const/avogadro's number6
9753502870diffusiondispersion by random motion from higher to lower concentration7
9753502871effusionmolecules moving out of tiny hole into vacuum, easier problem lighter molecule, higher T, higher P, less obstructions leads to higher effusion8
9753502872graham's law of effusionrates of effusion same hole T, P rate₁/rate₂ = √(molar mass₂/molar mass₁) = velocity₁/velocity₂9
9753502873boltzmann distributioncurve of frequency of speeds of gas atoms in a sample higher T increases spread10
9753502874van der waals equation of staterevision to pv = nrt that more real (P + a(n/V)²)(V - nb) = nRT don't memorize but a is interactions and b is volume of molecule11
9753502875system and surroundingssystem: intersting, reactant-products surroundings: everything else12
9753502876WorkW = F.x = -P∆V for const P13
9753502877heatnon-work energy transfer vibrations, radiation14
97535028780th law of thermoheat goes from higher to lower15
9753502879specific heat capacityS = energy/(mass*∆T)16
9753502880molar heat capacityenergy/(n*∆T)17
9753502881calorimeterthermos of water ideal: no heat loss and no heat capacity Tobject = Th20; Qobject = -Qh2018
9753502882doing calorimeter problemsTobject = Th20; Qobject = -Qh20 specific heat object*mass*∆T = -(specific heat water*mass*∆T)19
9753502883law of dulong and petitmetals have same specific heat per molar mass; higher molar mass linear increase in specific heat20
9753502884thermal conductivityhow easily spread heat internally21
9753502885molecular heat capacitybigger molecule is higher heat capacity22
9753502886enthalpyH; ∆H = q23
9753502887endo/exothermicexothermic: heat released into surrounding world, negative enthalpy bc lose it endothermic: rarer, heat absorbed, positive enthalpy; energy gains24
9753502889redoxreduction oxidation reaction reduction: gain e⁻, charge reduced oxidation: looses e⁻, charge increased25
9753502890oxidation number1) monatomic ions: oxidation number = charge 2) sum of oxydation numbers = total charge 3) F = -1 4) O = -2 5) H = +1 all rules true unless violate higher rule26
9753502891doing redox reactionssplit into half that oxidized and half that reduced balance non-OH elements balance O on one side with H₂O on the other balance H with H⁺ ions on other side add up net charge on both sides and balance w/ e⁻ multiply halves separately to balance e⁻ then add them so e⁻ cancels27
9753502892redox reactions in basicsolve for acidic solution then add OH⁻ to cancel H⁺ and cancel out extra H₂O formed on both sides28
9753502893gauge pressureabsolute pressure - atmospheric pressure29
9753502894absolute pressurethe actual pressure at a given point30
9753502895pascalN/m² = really small31
9753502896bar100,000 pascals (100kPa)32
9753502897atmosphereatm = 101,325Pa ≅ 1bar33
9753502898torr1mm of Hg (pressure needed to raise up 1mm of mercury)34
9753502899PSIpounds/inch²35
9753502900barrometermeasures atmospheric pressure36
9753502901manometerheight difference in U-tube is the pressure of the gas in container that you're measuring37
9753502902atmospheric pressureatmospheric pressure = 1atm = 101,325Pa = 14.7PSI = 760torr ≅1bar = 1/1.01325bar38
9753502903boyle's lawP₀V₀ = P₁V₁ with const temp and amount of gas39
9753502904charles' lawfor const pressure and amount of gas40
9753502905avogadro's lawfor const pressure and temperature41
9753502906ideal gas lawPV = nRT pressure*volume = mols*gas constant*temperature (in kelvin) generally work down to 2 variables initial = constant = 2 variables final42
9753502907STPstandard temperature and pressure 0C (273.15K) at 1atm at STP, 1mol = 22.4L for just about any gas43
9753502908acidanything releasing H⁺ into water44
9753502909baseanything releasing OH⁻ into water45
9753502910acid namingif the anion ends in -ate or -ide; change that to an -ic (ie: nitrate-nitric acid) if the anion ends in -ite; change to -ous (ie: nitrite-nitrous acid) these just refer to anion and H when has no oxygen in it, add hydro- (ie: HCl hydrochloric acid, HNO3 nitric acid)46
9753502911adding and subtracting Oper- is add oxygen (ClO₄⁻ from chlorate) -ite is subtract oxygen (ClO₂⁻ from chlorate) hypo____ite is subtract 2 oxygen (ClO⁻)47
9753502912VSEPRvalence shell electron pair repulsion: pairs of electrons will be angled as far from each other as possible each angle roughly equal but bigger angle with more electronegative or electron lone pair48
9753502913linear bondcan also be trigonal bipyramidal with 3 lone pairs or octahedral with 4 lone pairs49
9753502914trigonal planar bond12050
9753503047tetrahedral51
9753502915trigonal bipyramidalthink linear and then trigonal planar across it52
9753503048octahedral53
9753503049trigonal pyramidal54
9753502916bentwater; can also be trigonal planar with 1 lone pair?55
9753503050see-saw56
9753503051T-structure57
9753502917electric dipole momentqr; point from neg partial charge to positive partial charge58
9753502918polar moleculesbond is polar if 2 molecules have diff electronegativity molecules is polar of dipole moments don't cancel out from symmetry59
9753502919network solidnetwork covalent solid in forever expanding network; formula just empirical diamond, graphite, silicon carbide, silicon dioxide hard to break and boil60
9753502920ionic compoundslike network solid just with repeating pattern of ions61
9753502921solvent solutesolute dissolved in solvent62
9753502922dissolvedbroken into individual molecules or ions surrounded by solvent molecules; process of it called solvation or hydration in water63
9753502923electrolyteraises electrical conductivity when dissolved in water synonymous with salt (ionic compound) weak electrolytes only raise conductivity a bit since no disassociate much while strong electrolytes a lot64
9753502924molaritymols of solute/L of solution (M)65
9753502925molalitymols of solute/kg of solvent (m)66
9753502926mass percentmass of solute/mass of solution67
9753502927mole fractionmols of solute/mols of solution68
9753502928normalitymolarity*active constituents per mol for H+; normality = 3M for H3N69
9753502929precipitateto change phase while dissolved in water (usually talk about solid)70
9753502930equation typeschemical eq: KI(aq)+NaCl(aq) -> KCl(s)+NaI(aq) ionic eq: K⁺(aq)+I⁻(aq)+Na⁺(aq)+Cl⁻(aq) -> I⁻(aq)+Na⁺(aq)+KCl(s) net ionic eq: K⁺(aq)+Cl⁻(aq) -> KCl(s)71
9753502931solubilityexperimentally determined number for how much can be dissolved in; varies72
9753502932highly soluble stuffionic compounds with: nitrate, ammonia, or alkali metals most ionic compounds with: halogens or sulfates73
9753502933acid base reactionsstuff⁻(H⁺) + blah⁺(OH⁻) → H₂O + stuffblah74
9753502934aq and stuff(aq) - dissolved in water (s) - solid (l) - liquid (g) - gas75
9753502935valence shelloutermost electrons that do the bonding or: the shell with the highest n value76
9753502936gradient from ionic to covalentionic: just completely take electron to fill own shell covalent: share atom so in both shells inbetween: when electronegativity diff is >2 is ionic; inbetween is polar bond where share but more towards 1 atom77
9753502937electronegativityhow much pulls electrons; Fl = 4 = most more up and right; difference of 2 is cutoff above which is called ionic; more difference is more polar Fl=4, decrease by 0.5 each on that row78
9753502938lewis dot structureshows valence electrons as dots79
9753502939octet ruleatoms need 8 valence electrons but there are exceptions and formal charge takes precedence Row 2 always obeys octet rule 8 = electrons in pairs + *all* electrons in bonds80
9753502940isomerMolecules with the same formula but different structure81
9753502941resonancemult structures possible; sort of shifts between possibilities draw all with <=> between ie: carbonate could be double bond at any of those 3 bonds82
9753502942formal chargeapprox charge on individual atom valence electrons - electrons in pairs - ½ of electrons in bonds when violate: want more neg charge on electronegative atom83
9753502943covalent compound naming2 elements: numerical prefix+element 1 numerical prefix+element 2+ide dihydrogen monoxide carbon tetrahydride84
9753502944orbit model of atomlike san jose t shirt atoms fly in orbit like little planets around nucleus problems: + charge should like mega attract, accelerating when orbiting and accel electrons gives off EM radiation losing energy85
9753502945bohr modelatoms orbit nucleus at set distances where they're stable emission spectra are jumps from one stable orbit to the next and releases certain wavelengths of light E = -13.6z²/n² where z is atom # and n is energy level of orbit; energy gap between is line spectra still wrong because orbiting and losing energy as radiation86
9753502946wavefunction3D model of electron location since behave as wave and particle psi (n, L, Ml, Ms)87
9753502947first quantum numbern = principle quantum number determine energy level, like n in bohr model; higher n is higher NRG; from >188
9753502948second quantum numberfancy L = angular momentum quantum 0≤L89
9753502949third quantum numberM sub l = magnetic quantum -L≤M sub l≤L determines shape of that letter of orbit so S has 1 shape, P has 3 shapes (diff axes), d has 5 (weird)90
9753502950fourth quantum numberM sub s = spin quantum M sub s = ±½; doesn't affect/isn't affected by other quantums91
9753502951aufbau principleelectrons will fill lowest energy levels first if all are filled at lowest energy levels => ground state92
9753502952pauli exclusion principleonly 1 electron for each combo of quantum numbers ie: n=1 -> L must be 0, Ml must b 0, spin is ±½ so 2 possible for S193
9753502953why does wavefunction workassumes all hydrogen atoms bc if just look at outermost, the rest of the positive charge and electrons combined look like a hydrogen atom, ignores interactions between electrons, so not all with the same n are same energy bc S and stuff are closer to nucleus so experience more pull94
9753502954penetrationhow close to nucleus a shell is, more penetration = closer = lower potential s most penetration then p and stuff, why pyramid and weird order95
9753503052order of orbital filling96
9753502955full electron configurationsaying how much in all orbitals C: 1s² 2s² 2p²97
9753502956noble gas notation[last noble gas] then shells outside that actually used in bonding Ba: [Xe] 6s²98
9753502957electron config O²⁻[Ne] = 1s² 2s² 2p⁶99
9753502958weird electron configCr - only 1 electron in last S orbital, same for Cu100
9753502959Hund's rulein partially filled subshell, filled to maximize total spin101
97535029601st ionization energyhow much to pull off electron; more up (bc closer to nucleus) and to the right (larger nucleus); drops when start on new shell and from N to O bc big change spin very little variation in transition metals and lanth/act102
97535029612nd+ ionization energiesgoes up logarithmically with big jumps up in energy required each time you start on a new shell its like pulling electron off the next element back, so first off lithium ez, 2nd insane hard103
97535029622 eq's for lightE = hf = planck's const*frequency c = fλ = velocity of light = frequency*wavelength104
9753502963Isotopecombination of atomic number and atomic mass number; varying stability; chemical properties very similar except for small like hydrogen where large % mass change105
9753502964Why mass on the periodic table isn't integerit's an average of all isotopes also, mass defect106
9753502965AMUatomic mass unit roughly mass of proton and neutron and 2000 times the mass of an electron exactly: AMU = C₁₂/12107
9753502966mol6.02*10²³; scalar 1mol of AMU's = 1gram 1mol of C₁₂ = 12g108
9753502967stoichiometrystudy of how much reactants and products in rxn; shift numbering around to get balance of elements across both sides109
9753502968theoretical yieldhow much product should hypothetically be made by a certain combo of reactants110
9753502969actual yieldhow much product is really made as a percent of theoretical yield (how much should be made in a perfect world) difference is that not all react, some make diff reactions111
9753502970percent compositionwhen you have the mass of different elements in a sample, divide by molar mass to get mols of each element then find ratio between them to get empirical formula real formula can be any multiple of empirical, find if you have molar mass of substance112
9753502971combustionbasically react a compound with excess oxygen to produce a bunch of oxides H→H₂O; N→NO₂; C→CO₂; O→O₂113
9753502972combustion analysisbased on weight of oxides left over, find the mols of each oxide, then the mols of that element, then ratio between the mols for empirical, then if have molar mass can find oxygen or if have total starting mass, find oxygen by computing molar mass of what you have and then calculating oxygen to fill in extra114
9753502973limiting reactantsreactant that runs out first in a reaction even the one with more mols or more mass can be limiting because it can be like 1A+5B→3C so even in you have more B, it can still limit just calc mols of limiting and then that's how much corresponding of others there is115
9753502974valencethe number of electrons in the outer valence shell that are open for bonding116
97535029752 ways that electrons bond atomsit happens because atoms more stable with full shells ionic: one atom with way more electronegativity rips an electron to fill its own shell and empties the other shell; the charge pulls them together covalent: share an electron so it counts for both to fill shells117
9753502976precisionall similar inaccuracies; point of sig figs118
9753502977accuracyclose to the truth119
9753502978what count as sig figs1,000 - only the 1 is significant 1,000. - 4 sig figs line over a number - last sig fig 2.4390 - 5 sig figs 4.560*10³ - 4 sig figs 1,000,004 - 7 sig figs 0.0000034 - 2 sig figs120
9753502979add/subtract sig figsround to highest sig fig place value 14.9283+9.34+1234.5 = round to the .5121
9753502980multiplying/dividing sig figsfind result and only count the number of sig figs of the number with the least sig figs 4.35*1002*3 = 13076.1 = 10000 (1 sig fig) because 3 has only 1 sig fig122
9753502981order of operations sig figsregular PEMDAS; do NOT round after each step, just keep track of where the last sig fig is and keep going, round at the end123
9753502982(4.53+5.8123)*(9.3+300)3000124
9753502983liter1L = 1000cm³ = 10x10x10cm125
9753502984celsius and fahrenheitF = 9/5C + 32; C = 5/9*(F-32) celsius is 0 is freezing and 100 is boiling126
9753502985kelvin0k is impossible absolute 0; K = 273.15+C useful because when you mult by 2, actually 2x hotter127
9753502986mixturecan be separated into different constituents without chemical reactions128
9753502987compoundconnected by chem bonds129
9753502988heterogeneous mixturelooks like diff substances130
9753502989homogeneous mixturemixture but can't see different components131
9753502990solventmajority in solution, solute is minority solution is same as homogeneous mixture132
9753502991elementcan't split into something else133
9753502992physical means of separationdistillation (boil off), fractional freezing (based on which freeze first), filtration, centrifugation, chromatography134
9753502993law of multiple proportionsseen in systems where 2 elements make multiple compounds; the ratio between them has a smallest unit in the ratio -> atoms exist135
9753502994cathode ray tubesbeam of particles; put stuff in there and find that they are really small and neg charged136
9753502995millikan oil drop expthe drops were suspended by the E-field so can calc charge and find that all clear multiples of minimum charge = charge of an electron137
9753502996plum pudding modelbased on millikan oil drop138
9753502997rutherford gold foilalpha particles should be slightly deflected by plums in the pudding but some large deflection, calc that nucleus tiny, has all +, and most mass139
9753502998atomic #protons in an element which determines the element ie: Z = protons in an element = 2 for He140
9753502999atomic mass numberneutrons + protons = 4 for He = A141
9753503000isotopedifferent number of neutrons for a given element; little change in oscillation and mass insignificant except small elements142
9753503001mass defectdifference between mass of sum of parts and weighed mass is negative mass that is the amount of negative potential holding nucleus together m = e/c²143
9753503002iupac table naming systemcolumns labeled 1-18144
9753503003weird table naming systemgoes 1a 2a then weird b stuff for middle then 3-8a for the rightmost 6 rows ending in 8a with Noble gases145
9753503004group 1alkali metals except hydrogen all ions 1+nonreactive, reg it's very reactive146
9753503005group 2alkaline Earth metals 2+ ions nonreactive but reg are reactive147
9753503006group 18Noble gases don't make ions or chem bonds148
9753503007group 17halogens only 1- ions nonreactive, reg are reactive149
9753503008group 16neutral or -2 ions only except oxygen which can be weird150
9753503009group 15usually neutral but when it is upon it's -3 ions151
9753503010group 14carbons and stuff ions are rare152
9753503011iron ionsFe, Fe2+, Fe3+153
9753503012iron symbolFe154
9753503013sodium symbolNa155
9753503014potassium symbolK156
9753503015phosphorus symbolP157
9753503016silver symbolAg158
9753503017gold symbolAu159
9753503018copper symbolCu160
9753503019Cobalt symbolCo161
9753503020lead symbolPb162
9753503021Mercury symbolHg163
9753503022tungsten symbolW164
9753503023tin symbolSn165
9753503024antimony symbolSb166
9753503025magnesium symbolMg167
9753503026manganese symbolMn168
9753503027spell Ffluorine169
9753503028chromium ionsCr, Cr2+, Cr3+170
9753503029Cobalt ionsco, co2+, co3+171
9753503030nickel ionsni, ni2+172
9753503031copper ionscu, cu+, cu2+173
9753503032aluminum ionsAl, al3+174
9753503033silver ionsag, ag+175
9753503034zinc ionszn, zn2+176
9753503035tin ionssn, sn2+, sn4+177
9753503036lead ionspb, pb2+, pb4+178
9753503037Mercury ionshg, hg sub 2 up 2+, hg2+179
9753503038cation+ ion180
9753503039anion- ion181
9753503040cation namingfe2+ = fe (ii) co 3+ = co iii hg sub 2 up 2+ = hg i182
9753503041anion namingelement root + ide oxide carbide nitride sulfide etc183
9753503042ionic compound namingcation then anion like iron (ii) oxide number can be inferred because charges must balance184
9753503053chlorate185
9753503054hydroxide186
9753503055nitrate187
9753503056skip this188
9753503057sulfate189
9753503058permanganate190
9753503059peroxide191
9753503060phosphate192
9753503061ammonium193
9753503043acetateor CH₃OO⁻194
9753503044per_____________means add 1 oxygen to whatever ion follows the per ie: peroxide is 1 O more than reg oxide exception is permanganate195
9753503045hydrogen sulfateor bisulfate196
9753503062hydrogen phosphate197
9753503046hydrogen carbonateor bicarbonate198
9753503063cyanide199
9753503064dihydrogen phosphate200
9753514343periodic trends: electronegativeelectronegativity/electron affinity: more to up and right201
9760563323periodic trends: atomic radiias go right: decrease bc larger charge at center pull in as go down: increase bc more electron shells202
9760764797hydrogen bondinghydrogen bond to small electronegative atom w/ lone pairs gives hydrogen partial positive charge so can create a dipole-dipole interaction with another electronegative atom higher boiling point, surface tension203
9762027244dipole-dipole interactionattraction between oppositely charged portions of polar molecules204
9762042553london dispersion forceselectrons are randomly jumping around so creates temporary dipole in various places which can cause attraction only intermolecular force in non-polar, more common in larger molecules205
9762393632dipole momentDipole = Qr = charge*separation; how strong dipole is points towards electronegative206
9763397414hybridizationwhen form mult bonds w/ valence electrons, may combine multiple shells so for a carbon, sp3 -> spin of +2 not 0207
9763546586sigma and pi bondssigma is first, pi is any other bonds208
9765097665heating curvesenergy added vs temp line up and then lateral lines as energy for phase change209
9765212552dynamic equilibrium (phase)balance between forward and back sublimation condensation or whatever210
9765222121vapor pressurepressure of a gas from fluid evaporation thing more from higher T and higher volatility211
9765350022types of solidsmolecular: held by intermolecular forces; ice ionic: ionic bonds, crystal; salt covalent network: repeating pattern; quartz metallic: metallic bonding; metals212
9765500001temp and solubilityhigher temp raise soluble solid higher temp lower soluble gas213
9765506995colligative propertiesproperties of solutions change boiling point, freezing point, osmotic pressure, vapor pressure214
9765622028rauolts lawvapor pressure = pressure of pure*mole fraction solvent215
9778962426boiling point elevation∆T = iKm = vant hoff factor (how many things it splits into, nacl is 2)*constant*molality216
9779025430osmotic pressure elevation∆osmotic = MRTi = molarity*R*T*vant hoff217
9779110702types of chem rxnssynthesis - combine decomposition - split combustion - oxygen react w/ something displacement - atoms from one thing replace atoms in another double replacement - switch positive atoms with one another218
9782819020equilibrium meaningforward and backwards reactions balance219
9782821215equilibrium constantKc220
9782823756equilibrium constant pressureswhere all the stuff is in partial pressures; Kp multiply Kc by (RT)^n = Kp = RT^(number of product mols - number of reactant mols)221
9786919709reaction quotientQ = Kc calculated when not in equilibrium if Q bigger than Kc, top more, products more, so move in reverse222
9786944173catalyst equilibriumno effect on equilibrium, only speed of rxns223
9786991319what makes a strong acidlarge A in HA, polar HA bond224
9787034457Kwequilibrium constant of water225
9787083547pH-log[H+]226
9787107573Kaacid equilibrium constant227
9787149679polyprotic acidKa down a lot each time228
9787156226Kbequilibrium constant for base229
9787165192conjugate acid/basewhen release H or OH, what left behind conjugate of strong does nothing conjugate of weak is weak of other thing230
9787240063common ion effectif you have hydrochloric acid or something, if you add more chloride ions, it will shift equilibrium left and increase pH231
9794286049buffersadd conjugate base/acid in system with its acid/base when add more H or OH, consumes some of buffer but the other thing is weak and doesn't change do ICE table where add amount of strong acid to neutral and subtract from cation232
9794334418henderson-hasselbalchfor buffer solution where Ka is for buffer233
9794509978titration curvesstrong acid-strong base is like but mirrored version of right side where steep up and equivalence point at 7pH weak acid-strong base is like image, conjugate buffers, buffer actually raises pH so >7 at equivalence point234

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