how can i know if a solution is aqueous or solid? i have a test tomorrow and don't know how to do this PLEASE HELP!!! i have this question on my homework...Will precipitation occur when the following solutions are mixed?

1. Na2Co3 and AgNO3
2. NaNO3 and NiSO4
3. FeSO4 and Pb(NO3)2

1. Silver carbonate is not soluble.

2. Nickel nitrate and sodium sulfate will be both soluble, no reaction.
3. Lead sulfate is not soluble.

Here is a simplified list of solubility rules.

http://www.files.chem.vt.edu/RVGS/ACT/notes/solubility_rules.html

To determine if a solution is aqueous or solid and if precipitation will occur, you need to consider the solubility rules and the specific reactants involved.

1. Na2CO3 and AgNO3:
To determine if precipitation will occur, you need to compare the solubility of the compounds formed. According to the solubility rules, carbonates (CO3²⁻) usually form insoluble compounds with most metal ions, except for Group 1A ions (e.g., Na⁺). Silver ions (Ag⁺) form insoluble compounds with most halide ions. Therefore, when Na2CO3 and AgNO3 are mixed, a precipitation reaction is expected to occur, resulting in the formation of a solid Ag2CO3. Thus, the solution is solid.

2. NaNO3 and NiSO4:
Both sodium nitrate (NaNO3) and nickel sulfate (NiSO4) are soluble compounds, according to the solubility rules. Therefore, when NaNO3 and NiSO4 are mixed, no precipitation reaction is expected to occur. The resulting solution will be aqueous.

3. FeSO4 and Pb(NO3)2:
To determine if precipitation will occur, we need to compare the solubility of the compounds. Iron(II) sulfate (FeSO4) is a soluble compound according to the solubility rules, while lead(II) nitrate (Pb(NO3)2) is also soluble. Therefore, when FeSO4 and Pb(NO3)2 are mixed, no precipitation reaction is expected to occur. The resulting solution will be aqueous.

Remember to review the solubility rules to properly predict precipitation reactions and the states of the reactants. Additionally, practicing similar questions and understanding the concepts will help you prepare for your test. Good luck!