I have a question in chemistry about combining compounds. I didn't really understand from my teacher. I have to combine Pb(NO3)2 with Na4OH. Also combine CaCl2 with Na2SO4. Can someone explain.
There is no Na4OH. I assume you meant NaOH although you may have meant NH4OH.
I think your teacher may be talking about solubility. Pb(NO)3 + NaOH produces Pb(OH)2 which is insoluble in aqueous solution. CaCl2 + Na2SO4 produces CaSO4 which is insoluble in aqueous solution. Here is a simplified list of solubility rules. http://www.chem.vt.edu/RVGS/ACT/notes/solubility_rules.html
thanks
Certainly! I'd be happy to explain how to combine these compounds.
To combine the compounds Pb(NO3)2 and Na4OH, we'll need to determine the balanced equation for this reaction. Let's break it down step by step:
1. Identify the cations (positive ions) and anions (negative ions) in each compound:
- Pb(NO3)2: The cation is Pb2+ (lead ion), and the anion is NO3- (nitrate ion).
- Na4OH: The cation is Na+ (sodium ion), and the anion is OH- (hydroxide ion).
2. Determine the charges for each ion:
- Pb2+ has a 2+ charge.
- NO3- has a 1- charge.
- Na+ has a 1+ charge.
- OH- has a 1- charge.
3. Balance the charges of the cations and anions to form a neutral compound:
Since the charges of Pb2+ (2+) and NO3- (1-) are equal (2+ and 2-), we don't need to balance the charges further.
4. Write the final balanced equation:
Pb(NO3)2 + 2NaOH → Pb(OH)2 + 2NaNO3
Therefore, when you combine Pb(NO3)2 (lead(II) nitrate) with Na4OH (sodium hydroxide), it will react to form Pb(OH)2 (lead(II) hydroxide) and NaNO3 (sodium nitrate).
Now let's move on to the second combination of compounds:
1. CaCl2: The cation is Ca2+ (calcium ion), and the anion is Cl- (chloride ion).
2. Na2SO4: The cation is Na+ (sodium ion), and the anion is SO4^2- (sulfate ion).
3. Determine the charges for each ion:
- Ca2+ has a 2+ charge.
- Cl- has a 1- charge.
- Na+ has a 1+ charge.
- SO4^2- has a 2- charge.
4. Balance the charges of the cations and anions:
Since the charges of Ca2+ (2+) and Cl- (1-) are equal (2+ and 2-), we don't need to balance the charges further.
5. Write the final balanced equation:
CaCl2 + Na2SO4 → CaSO4 + 2NaCl
Therefore, when you combine CaCl2 (calcium chloride) with Na2SO4 (sodium sulfate), it will react to form CaSO4 (calcium sulfate) and NaCl (sodium chloride).
I hope this explanation helps you understand how to combine these compounds!