Official June SAT II Chem

Test Preparation
61

<p>endothermic is... melting and vaporization because it requise energy input.</p>

<p>the other choices were condensation and sublimination?</p>

62

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<p>heat + solid > liquid melting
heat + Liquid > Gas vaporization
heat + Solid > gas sublimation</p>

<p>it was those 3</p>

63

<p>more answers...</p>

<p>one question askeed which would make an (basic) solution by adding water?
I. Ag
II. something
III. HSO3</p>

64

<p>evilolive is correct</p>

<p>anyone remember the one with Ag and Mg? A roman numeral one...</p>

<p>products are Ag and Mg2+ i think? i forget.</p>

65

<p>i had like five CE bubbles filled in i think, what about y'all?</p>

66

<p>accel i got sublimation i think as well cause thats solid to gas and vaporization is l to gas and melting is solid to liquid so they are all endothermic</p>

67

<p>j_blg the answer was SO3.</p>

<p>The question is which would make an acidic solution if it was put into water.</p>

<p>SO3 is a nonmetal oxide, which is an acid anhydride and forms acid in water. Thus, it would create an acidic solution</p>

68

<p>i got 5 CE's i also got to F, F in a row (112 adn 113)</p>

69

<p>oh shoot! sublime is gas to vapor.. i was thinking backwards!! oh no i got that one wrong also :(</p>

70

<p>"this is the electron configuration of Mn 1s2...3d5 4s2"</p>

<p>/me consults his periodic table, me bangs his head on the desk</p>

71

<p>sigh hopefully 2 omits and 3-5 wrong are in the 700 range :(</p>

72

<p>i got 1 liter of water was not equivalent in terms of number of particles</p>

73

<p>"sigh hopefully 2 omits and 3-5 wrong are in the 700 range"</p>

<p>lowest 780 is a raw score of 73/85 on my practice tests...</p>

74

<p>"i got 1 liter of water was not equivalent in terms of number of particles"
i got that too....but i'm not sure why, anyone care to confirm?</p>

75

<p>"i got 1 liter of water was not equivalent in terms of number of particles
i got that too....but i'm not sure why, anyone care to confirm?"</p>

<p>1 L of H20= 1,000 ml</p>

<p>1ml=1gram
1,000 grams H20 is alot more than 1 mole worth</p>

76

<p>everything else was one mole --> 22.4 liters of a gas is one mole at STP...etc.</p>

<p>and 1 liter of water is 1 KG of water which is a lot more than 1 mole</p>

77

<p>For the titration, I put strong base because dont the strong acid/weak base curves have lots of little jumps on them while the strong acid/strong base curves have only one big jump, like the one on the test did?</p>

78

<p>i was looking at that answer but if it was a strong base it would have taken 50 ml of it to titrate the 50 ml of the unknown substance. Since it took only 25ml i guess it was a weak base (NH3).</p>

79

<p>"For the titration, I put strong base because dont the strong acid/weak base curves have lots of little jumps on them while the strong acid/strong base curves have only one big jump, like the one on the test did?"</p>

<p>The equivalence point was at pH=7, which only occurs with a strong acid and strong base</p>

80

<p>damnn i think u are right..i guess the molarities were different causing it only to take 25 ml..nice man</p>