Calcium Carbonate Is Used to Form Exoskeletons

question 75

Multiple Choice

Calcium carbonate is used to form exoskeletons. It has a solubility-product constant of 5.0  10 ^{ 9}. What is the molar concentration of calcium ions in a saturated solution of calcium carbonate?

• A)2.5  10 ^{ 9} M
• B)7.1  10 ^{ 5} M
• C)3.5  10 ^{ 5} M
• D)5.0  10 ^{ 9} M
• E)4.7  10 ^{ 7} M

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