A mixture of lead, magnesium, nitrate and chromate ions are present in a solution. What will the precipitate be?**
a) MgPb
b) Pb(NO3)2
c) PbCrO4
d) MgCO3
To determine the precipitate that will form when the given ions are mixed together, we need to identify any possible insoluble compounds. These compounds are typically referred to as precipitates.
To do this, we can refer to a solubility chart that outlines the solubility of various compounds. In this case, we need to determine which combination of ions will form an insoluble compound.
Looking at the given ions:
1. Lead (Pb) - Lead compounds tend to form insoluble compounds with various anions.
2. Magnesium (Mg) - Most magnesium compounds are soluble, so magnesium is less likely to form an insoluble compound.
3. Nitrate ions (NO3-) - Most nitrate compounds are soluble in water.
4. Chromate ions (CrO4^2-) - Chromate compounds tend to form insoluble compounds with several cations, including lead (Pb).
Based on this information, the formation of a precipitate is most likely to occur with the combination of lead (Pb) and chromate ions (CrO4^2-). Therefore, the precipitate will be:
c) PbCrO4 (lead(II) chromate)
Please note that this is a general explanation, and it is always advisable to consult a solubility chart or reference source for more precise information regarding solubility of specific compounds.