Calcium Carbonate Is Used to Form Exoskeletons

question 50

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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