Acids, Bases, and Salts

Test Preparation SAT Subject Test Preparation
1

<p>How exactly are you supposed to know when something is a strong or weak acid or base? Most of the Q's I missed on this practice test are explained by saying, "Since you know that X is a weak acid, blah blah blah..." I guess I just missed this whole thing...Is this just something you memorize, or does it have to do with characteristics of specific groups? </p>

<p>Also, what is a salt, really? And how do you identify one?</p>

<p>For instance, how was I supposed to <em>know</em> that Fe(NO3)3 was an acidic salt, or that Fe(OH)3 is not a very soluble hydroxide?</p>

<p>Thankies! <em>Cries</em></p>

2

<p>Memorize them. The only strong acids are H2SO4, HCl, HI, HB, HNO3, and HClO4. the only strong bases are those of the alkali metals.</p>

3

<p>Thank you, rose!</p>

<p>Anybody for the salts?</p>

4

<p>A salt is ANY ionic compound that's neutral with postively charged and negatively charged components.</p>

<p>Acid + Base => Water + Salt (If I remember right)</p>

5

<p>to see which salt is more acidic or basic look at its composition...</p>

<p>NaCl, comes from HCl and NaOH, both strong acid/base, so it has no effect.... same for KNO3
for something like... K3PO4 ---> KOH(strong) and H3Po4(weak), so it wil be a more basic salt...
Cu(no3)... dont kno the coefficients, but either way, it will be ACIDIC, since its derived from CuOH and Hno3, a STRONG acid and WEAK base</p>

6

<p>Thanks Edward and Doodles!</p>

<p>Everything is so much clearer now...I love this forum.
Now, on to that nuclear chem. <em>Charges ahead</em></p>

7

<p>Strong Acids:
Cool Bro, I'll Clean the Sock Closet Now.
HCl Hbr HI HClO3 H2SO4 HClO2 HNO3.</p>

<p>Strong Bases:
everything that includes Alkali/Alkalineearth + OH-</p>