Question

AlBr3 (aq) combines with aqueous Hg(NO3)2
(aq). Which, if any, of the products is a precipitate?


Al(NO3)3


HgBr2


Neither product is a precipitate.


Both products are precipitates.

Answer 1

The Solubility Rules
1. Alkali metal (Group IA) compounds are soluble.

2. Ammonium (NH4+) compounds are soluble.

3. Nitrates (NO3-), chlorates (ClO3-), and perchlorates (ClO4-) are soluble.

4. Most hydroxides (OH-) are insoluble.
The exceptions are the alkali metal hydroxides and Ba(OH)2.
Ca(OH)2 is slightly soluble.

5. Most chlorides (Cl-), bromides (Br-) or iodides (I-) are soluble.
The exceptions are those containing Ag+, Hg+2, and Pb+2.

6. Carbonates (CO3-2), phosphates (PO4-3) and sulfides (S-2) are insoluble.
The exceptions are the alkali metals and the ammonium ion.

7. Most sulfates (SO4-2) are soluble.
CaSO4 and Ag2SO4 are slightly soluble.
BaSO4, HgSO4 and PbSO4 are insoluble.
(via http://dept.harpercollege.edu/chemistry/chm/100/dgodambe/thedisk/chemrxn/pickppt.htm . ur best friend.)

Answer 2

^always know that. AP Chemistry forces you to memorize it but regular chem doesn't

Answer 3

so are neither precipitates?

Answer 4

So obviously we need to make the equation first.
AlBr3 (aq) + Hg(NO3)2 (aq)=???
Knowing double replacement goes ab+cd=>ac+bd, we just need to follow that format while finding the products, but the products are given above so this isn't necessary

Answer 5

Yeah

Answer 6

thank you!