Question

(a) flake white was a white pigment used by renaissance artists, which was composed of a combination of lead(ii) carbonate and lead(ii) hydroxide. what are the correct chemical formulas for these two compounds?
pbo
pbhco₃
pbco₃
pb(oh)₄
pb(oh)₂
pb₂co₃
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Explanation:

Lead(II) carbonate: The carbonate ion is \(CO_{3}^{2 -}\), and lead has a charge of \(+ 2\) (as indicated by lead(II)). Using the criss - cross method (the magnitude of the charge of one ion becomes the subscript of the other ion), we get \(PbCO_{3}\).
Lead(II) hydroxide: The hydroxide ion is \(OH^{-}\), and lead has a charge of \(+ 2\). Using the criss - cross method, we get \(Pb(OH)_{2}\) (since \(2\) hydroxide ions (\(OH^{-}\)) are needed to balance the \(+ 2\) charge of lead).

Answer:

\(PbCO_{3}\) (for lead(II) carbonate) and \(Pb(OH)_{2}\) (for lead(II) hydroxide)