Official December SAT II Chemistry Thread

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301

<p>I: NaCl has a lower freezing point than CxH22O11
II: NaCl has a less molar mass than CxH22O11</p>

<p>i thought this was F/T</p>

302

<p>FFUUUCKK IM POSITIVE OF LIKE 20 wrong so far!!!, shiiit is there stil hope for a 700 with the curve</p>

303

<p>chichra: umm.. for that question in assertion reason type:
halogens are good oxidizing agents
because
samples of halogens contain O2..
what did u guys do?
i marked it true, fals buut im not sure...</p>

<p>i put F/F for that becuz
halogen have -1 charge they want to lose electron right so they want to be oxidized, which mean that they are recuding agents</p>

304

<p>anyone els withT/F q's</p>

305

<p>What’s the second part of the oxidizing question?</p>

306

<p>the boiling pt for NaCl one was T/F im pretty sure</p>

307

<p>What’s the second part? If water was added to water, the boiling temp would rise.</p>

308

<p>yeah but do u guyz agree on the halogen one?, also thrillz? can u give the whole Q for the NaCl question, cuz im confused</p>

309

<p>C11 H12 O11 molar mass > NaCl</p>

<p>just think, C = 12 g x 11...that alone is greater than NaCl</p>

310

<p>Hey can anyone look up the freezing temp of salt and the other compound?</p>

311

<p>yeah i know that but wut about the first part, does NaCl have a lower frezing point than C11H12O11</p>

312

<p>i thought the more particles in the compound the lower the freezing point</p>

313

<p>I thought so too.</p>

314

<p>so for the NaCl one it would be F/F right?</p>

315

<p>hurdlesrock, more particles in water does mean a lower freezing point. But particles isn't number of atoms.</p>

<p>NaCl -> Na+ + Cl- in water.
glucose is still glucose in water</p>

<p>Hence, each mole of NaCl would become 2 particles in water, while glucose is still one. Thus, NaCl has a lower freezing point, making the answer T/T, no CE (because obviously NaCl has a lower molar mass).</p>

316

<p>no False/True</p>

<p>
[Quote]
C11 H12 O11 molar mass > NaCl</p>

<p>just think, C = 12 g x 11...that alone is greater than NaCl

[/Quote]
</p>

317

<p>shiiii o yea i meant F/T, but seriosuy i still dont see y its TT, anyway any other T/F probs??</p>

318

<p>Barron's has a whole thing on it. Look up colligative properties. And Goldfish, it was TT because the 2nd statement was that the molar mass of NaCl is less than that of glucose.</p>

319

<p>agreed with chillaxin</p>

320

<p>negative 1 means that its reduced and has gained an electron (crazy termanolgy i know) so the answer to the halogen question is t/f</p>