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The chief compound in marble is CaCO3. Marble has been widely used for statues and ornamental...

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Chemistry

The chief compound in marble is CaCO3. Marble has been widelyused for statues and ornamental work on buildings, including suchstructures as the Taj Mahal (Figure 1) . However, marble is readilyattacked by acids via the following reaction.CaCO3(s)+H+(aq)⇌Ca2+(aq)+HCO3−(aq) Equilibrium constants at 25 ∘Care listed in the table below.

CaCO3 Ksp =4.5×10−9

H2CO3 Ka1 =4.3×10−7

H2CO3 Ka2 =5.6×10−11

Part A What is the molar solubility of marble (i.e., [Ca2+] in asaturated solution) in normal rainwater, for which pH=5.60?

Answer & Explanation Solved by verified expert
4.4 Ratings (638 Votes)
Answer We are given pH 560 Ksp of CaCO3 45109 H2CO3 Ka1 43107 H2CO3 Ka2 561011 We know the Ka2 is the    See Answer
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