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Page 1: 1) 2) 3)jeremyrosen.weebly.com/uploads/1/6/6/6/16669492/chemistry_entire_act_practice_240...As part of a demonstration, the teacher uses a hot plate to heat three liquids in beakers

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As part of a demonstration, the teacher uses a hot plate to heat three liquids in beakers to boiling. Liquid A is water, Liquid B is ethanol, and Liquid C is an aqueous copper(II) sulfate solution. The students observe the boiling liquids and note that, in each beaker, bubbles form on the bottom and side surfaces of the beaker and then rise to the liquid’s surface.

Liquid A Liquid CLiquid B

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QualityCore® Reference SheetChemistry

Atomic Structure

E = hν

c = λν

Gases

d =

T (K) = °C + 273

P total = PA + PB + PC + …

PV = nRT

n =

d =

P1V1 = P2V2

=

=

=

Percent Yield and Percent Error

% Yield = × 100

% Error = × 100⏐accepted value − experimental value⏐_________________________________accepted value

actual yield_______________theoretical yield

P2V2_____T2

P1V1_____T1

P2___T2

P1___T1

V2___T2

V1___T1

PM____RT

m__M

m__V

E = energyh = Planck’s constant = 6.63 × 10−34 J•sν = frequencyc = speed of light = 3.0 × 108 m/sλ = wavelengthNA = Avogadro’s number = 6.02 × 1023 mol−1

d = density (solids, liquids, and gases)m = massV = volumeT = temperatureP = pressuren = number of molesR = gas constant = 0.0821 L•atm/mol•KM = molar massSTP = 1.00 atm and 0.00°C1 atm = 760 mm Hg = 760 torr = 101.3 kPa1 mol of ideal gas = 22.4 L at STP

continued

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Liquids and Solutions

Percent (mass/mass) = × 100

M =

m =

XA =

M1V1 = M2V2

ΔT f = K f × m

ΔTb = Kb × m

Calorimetry and Thermodynamics

q = mCΔT

ΔH°rxn = ΔH°f (products) − ΔH°f (reactants)

ΔS°rxn = S°(products) − S°(reactants)

Acids, Bases, and Equilibrium

pH = − log [H+]

pOH = − log [OH−]

pH + pOH = 14

Kw = [H+][OH−]

Keq = where a A + b B c C + d D

Ksp = [A+]a[B−]b where AaBb(s ) a A+(aq ) + b B−(aq )

[C]c[D]d_________[A]a[B]b

molesA_________molestotal

moles of solute_____________kg of solvent

moles of solute_____________L of solution

mass of solute (g)__________________mass of solution (g)

M = molaritym = molalityXA = mole fraction of component AV = volumeΔT = temperature changeK f = molal freezing point depression constantK f (H2O) = 1.86°C/mKb = molal boiling point elevation constantKb (H2O) = 0.512°C/m

q = heatm = massC = specific heat capacityC (H2O) = 4.184 J/g•°CΔT = temperature changeΔH° = standard enthalpy changeΔS° = standard entropy change

[H+] = H+ molarity[OH−] = OH− molarityKw = ion-product constant for waterKw = 1.0 × 10−14 at 25°CKeq = equilibrium constantKsp = solubility product constant

© 2010 by ACT, Inc. All rights reserved.14193 *019248080* Rev 2

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1H

1.0083Li

6.94111Na

22.9919K

39.1037Rb

85.4755Cs

132.987Fr

(223)

4Be

9.01212Mg

24.3120Ca

40.0838Sr

87.6256Ba

137.388Ra

226.0

21Sc

44.9639Y

88.9157La*

138.989

Ac†

(227)

22Ti

47.8840Zr

91.2272Hf

178.5104Rf

(261)

23V

50.9441Nb

92.9173Ta

180.9105Db

(262)

24Cr

52.0042Mo

95.9474W

183.9106Sg

(263)

25Mn

54.9443Tc

(98)75Re

186.2107Bh

(264)

26Fe

55.8544Ru

101.176Os

190.2108Hs

(265)

27Co

58.9345Rh

102.977Ir

192.2109Mt

(268)

28Ni

58.6946Pd

106.478Pt

195.1110Ds

(281)

29Cu

63.5547Ag

107.979Au

197.0

30Zn

65.3848Cd

112.480Hg

200.6

5B

10.8113Al

26.9831Ga

69.7249In

114.881Tl

204.4

6C

12.0114Si

28.0932Ge

72.5950Sn

118.782Pb

207.2

7N

14.0115P

30.9733As

74.9251Sb

121.883Bi

209.0

8O

16.0016S

32.0734Se

78.9652Te

127.684Po

(209)

9F

19.0017Cl

35.4535Br

79.9053I

126.985At

(210)

2He

4.00310Ne

20.1818Ar

39.9536Kr

83.8054Xe

131.386Rn

(222)

58Ce

140.190Th

232.0

59Pr

140.991Pa

(231)

60Nd

144.292U

238.0

61Pm

(145)93Np

(237)

62Sm

150.494Pu

(244)

63Eu

152.095Am

(243)

64Gd

157.396Cm

(247)

65Tb

158.997Bk

(247)

66Dy

162.598Cf

(251)

67Ho

164.999Es

(252)

68Er

167.3100Fm

(257)

69Tm

168.9101Md

(258)

70Yb

173.0102No

(259)

71Lu

175.0103Lr

(260)

*

Periodic Table of the Elements

*019249080* Rev 1

© 2010 by ACT, Inc. All rights reserved.14192

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Answer Key

1) B2) B3) C4) A5) B6) D7) A8) C9) B

10) D11) A12) C13) C14) C15) C16) C17) D18) B19) A20) C21) C22) D23) B24) C25) B26) C27) C28) B29) D30) A31) A32) B33) D34) A35) C36) D37) C

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38) A39) D40) C41) B42) D43) B44) C45) C46) D47) A48) C49) A50) D51) C52) B53) D54) D55) A56) D57) D58) C59) A60) A61) A62) D63) B64) D65) B66) C67) C68) A69) B70) B71) B72) D73) B74) C

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75) C76) D77) C78) A79) D80) A81) B82) A83) B84) A85) C86) D87) B88) C89) A90) D91) B92) A93) A94) B95) D96) D97) A98) B99) C

100) B101) B102) D103) B104) B105) C106) C107) D108) D109) C110) D111) B

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112) A113) C114) A115) A116) D117) A118) A119) B120) C121) C122) A123) D124) C125) D126) A127) C128) D129) B130) A131) A132) A133) B134) D135) A136) C137) A138) A139) B140) B141) A142) A143) A144) C145) C146) B147) C148) A

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149) D150) A151) C152) D153) B154) C155) B156) A157) B158) B159) B160) A161) B162) A163) A164) C165) C166) A167) A168) D169) B170) B171) D172) D173) D174) D175) C176) C177) A178) D179) A180) A181) D182) D183) C184) B185) B

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186) D187) D188) C189) B190) B191) B192) B193) A194) A195) D196) A197) D198) A199) B200) D201) C202) C203) A204) A205) B206) B207) B208) D209) C210) C211) D212) D213) A214) C215) B216) D217) B218) B219) D220) B221) D222) D

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223) B224) B225) C226) C227) D228) C229) C230) A231) B232) B233) A234) D235) D236) C237) A238) D239) A240) C