June SAT: Chemistry Post-Test Discussion

Test Preparation SAT Subject Test Preparation
101

<p>here are answers that i remember, some (maybe alot) of them could be wrong.
VO2
substance that is (brittle?) and conducts electricity when melted: ionic solid
Na does not exist in its elemental form.
CH4 is not a base, and it does not have unshared pairs of electrons
T/T/CE question about iron something and iron block: TTCE
i would not heat a graduated cylinder under a fume hood in a lab
K + H2O yields OH- and H2
CCl4 or something like that has tetrahedral shape
NaF has highest melting point
Forward reaction is endothermic BECAUSE the energy of the reactants is greater than that of products: FT
ability of nitrogen to liquefy is due to london dispersion forces
F- has the smallest anion radius?
_Al + _S -> ratio is 2:3 cuz it forms Al2S3
2222KJ problem: 2222/4 = 555
A + B + heat -> C increase temperature to increase C concentration
CO2 is a greenhouse gas BECAUSE it creates an acidic solution with water: TT
0.01M HCl pH is 2
you use indicators to find the acidity of a solution</p>

<p>i remember some more, but ill post those later.</p>

102

<p>@violinplayer is there a way to only send one score</p>

103

<p>@Krazy Im 100percent with you!!! one thing do you guys remember the number of moles when FeSO4 or some sort undergoes an analysis reaction… I remember hesitating between 2 moles and 5 moles but put 5 in the end</p>

104

<p>Wait heating undre the fume hood is wrong?</p>

105

<p>what did people get for these:
A + 2B -> 2C equilibrium constant is 1X10^3, what is the constant for 2c -> 2B + A
i got 1*10^-3
solution of NaOH has [OH-] of 1X10^3. what is its [H+]? i got 1X10^11</p>

106

<p>yeah cause its a graduated cylinder</p>

107

<p>You cant heat a graduated cylinder using a Bunsen!</p>

108

<p>@Krazy
Same for the first one- you invert a Kc if a rxn’s reversed
for the second one i think it was 10^-3 for OH so I got 10^-11 :)</p>

109

<p>I have all the same answers as Krazy</p>

110

<p>@harharparis
yeah, you are right, forgot the negatives LOL</p>

111

<p>Was the linear CO2 thing a CE answer?</p>

112

<p>Yes. It was true true CE for CO2 has polar bonds but is nonpolar overall BECAUSE it is linear.</p>

113

<p>1) an element with 4s^2 4p^4 is in oxygen family?
2) an element with -3 as oxidation number is nitrogen family?
3) an electron is NOT 1/3 mass of an atom, but it is released through radioactive decay, and it is part of some reaction (that i forget), so I and II. III was the mass part, which should be wrong.</p>

114

<p>Yep. I had the same answers as you, Krazy.</p>

115

<p>@Krazy again- im still totally with you. we should ace this one !</p>

116

<p>What about the one that asked which property of a gas wasn’t a function of temperature? Was it density?</p>

<p>(Sorry if this has already been asked.)</p>

117

<p>What’s the minimum for a 750 based on the blue book?</p>

118

<p>@Daisie Yep</p>

119

<p>What was the reason that Iodine gas was above Iodine crystals? Sublimation?
Also the last Q was heat of formation?</p>

120

<p>Yep sublimation</p>