Quick SAT Chem Question

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1

<p>In the Barron's SAT chem book 07, one of the questions is the following</p>

<p>Statement I // The reaction of CaCO3 and HCl goes to completion.</p>

<p>BECAUSE</p>

<p>Statement II // reactions that form a precipitate go to completion.</p>

<p>The answer and explanation says that it is TF, beacause "The reaction does go to completion, but a gaseous product is formed, not a precipitate." </p>

<p>Here's my question, shouldn't the answer be TT? Statement II is true, but it does not explain statement I. Is this the book's error or have I misunderstood the format of SAT2 Chem the whole time?</p>

2

<p>It yields H2CO3 and CaCl2, neither of which is a gas. Hmm...</p>

3

<p>H2C03 breaks down into H20 and CO2, Carbonic acid is unstable.</p>

4

<p>yeah, it forms co2, which escapes. but shouldn it be TT? cuz statement 2 IS true, just not this case. my real question is whether the book is wrong or i misinterpreted the format of these qusetions.</p>

5

<p>I is true, CO2, CaCl2, and H2O are the products. None of them precipitate.</p>

<p>II is false, precipitation reactions don't go to completion because there will always be some ions that don't group together and precipitate. </p>

<p>TF means I is true and II is false, right?</p>