A mixture of lead, magnesium, nitrate and chromate ions are present in a solution. What will the precipitate be?
Question 2 options:
A) MgPb
B) Pb(NO3)2
C) PbCrO4
D) MgCO3
To determine the precipitate that will form in this solution, you need to identify the compound that is insoluble, or only slightly soluble, in water.
To do this, you can refer to a solubility chart or table. In the case of lead (Pb), lead chromate (PbCrO4) is insoluble in water and forms a yellow precipitate. Magnesium (Mg) and nitrate (NO3) ions are generally soluble, so they will remain in solution.
Therefore, the precipitate in this scenario will be PbCrO4, giving option C) PbCrO4 as the correct answer.