34.20 g of CaO is dissolved in 500.0 mL water. What is the concentration of the O2- ion?
CaO + H2O --> Ca(OH)2
Molar Mass of CaO = 56
500.0 = 0.5 L
34.2/56 = 0.6482M
OH = 1.2964 × 2 = 2.5929
= 2/0.0025929 + 0.5
= 2/0.5025929
= 3.9794M/L
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