AP Chemistry: Balancing and naming madness!

Test Preparation AP Test Preparation
1

<p>All numbers are subscripts for the element preceding it.</p>

<li>Name the following oxoacid and oxoanion:</li>
</ol>

<p>(a) H3PO3
(b) IO4-
(c) HBrO
(d) HSO4-</p>

<li>Give the balanced equation for each of the following chemical reactions:</li>
</ol>

<p>(a) Glucose (C6H12O6) reacts with oxygen gas to produce gaseous carbon dioxide and water vapor.</p>

<p>(b) Solid iron (III) sulfide reacts with gaseous hydrogen chloride to form solid iron (III) chloride and hydrogen sulfide gas.</p>

<p>(c) Carbon disulfide reacts with ammonia gas to produce hydrogen sulfide gas and solid ammonium thiocyanate (NH4SCN).</p>

<p>For #2, I don’t need a balanced equation. But can you guys help me write out the compounds so that I can balance them myself? I have no idea what they look like.</p>

2

<p>1) a) Phosphorous Acid
b) Iodine Tetroxide
c) Hypobromous Acid
d) Hydrogen Sulfate (I think)</p>

<p>2) a) oxygen gas is O2, carbon dioxide is CO2, water vapor is just H2O
b) Iron (III) Sulfide is Fe2S3, hydrogen chloride is HCl, iron (III) chloride is FeCl3, hydrogen sulfide is H2S
c) Carbon disulfide is CS2, ammonia is NH3.</p>

<p>You should learn how to name compounds and the rules for naming and such. I'd post them but I'm tired and it's quite a few sentences of information. Well good luck.</p>

3

<p>Thanks for the help. I missed the first week of AP Chem due to scheduling problems, so basically I missed the lecture on nomenclature and all the naming stuff.</p>

4

<p>1) a) phosphoric acid
b) periodate
c) hypobromous acid
d) hydrogen sulfate/bisulfate</p>

<p>Naming isn't a big deal, it's just a ton of wacky rules which you can probably find online somewhere or in your textbook. But good luck.</p>

5

<p>I've been stuck on this problem for quite some time. I need some help.</p>

<ol>
<li>Chloral hydrate (C2H3Cl3O2) is a drug formerly used as a sedative and hypnotic. It is the compound used to make "Mickey Finns" in detective stories.</li>
</ol>

<p>e. What mass of chloral hydrate would contain 1.0g Cl?</p>

<ol>
<li>Some bismuth tablets , a medication used to treat upset stomachs, contain 262 mg of bismuth subsalicylate, C7H5BiO4, per tablet. Assuming two tablets are digested, calculate the mass of bismuth consumed.</li>
</ol>

<p>ANSWER: 2(262mg) = 514mg.</p>

<p>This is question 110 in Zumdahl's Chemistry book for my AP Chem class. This this the correct answer? Could it be that simple?</p>

6

<p>58.
e.
(you're gonna have to add in the stuff but i'll do the equation)
1.0 g Cl x (1 mol Cl/35.5 g Cl) x (1 mol C2H3Cl3O2/3 mol Cl) x ( 165.5 g C2H3Cl3O2/in 1 mol C2H3Cl3O2) =</p>

7

<ol>
<li>the answer is wrong (someone verify?)</li>
</ol>

<p>You're supposed to fine the mass percent composition of Bi in that compound and then multiply that percent by 514 mg to get the answer.</p>

8

<p>Something like that.</p>

<p>The way I'd do number 110 is find molar mass of bismuth subsalicylate (362g), divide the mass given (.262g) by that to find how many moles of it we have. It turns out to be .000724, and since there's one mole of Bi per mole of bismuth subsalicylate, multiply that by the molar mass of Bi (.000724mol x 209g) which gives us .15127g of Bi per tablet. Multiply that by 2 tablets and it's .303g of Bismuth (or 303mg).</p>

<p>So the correct answer for 110 is 303mg.</p>