Concept explainers
One of the chemical controversies of the nineteenth century concerned the element beryllium (Be). Berzelius originally claimed that beryllium was a trivalent element (forming Be3+ ions) and that it gave an oxide with the formula Be2O3. This resulted in a calculated
I | II | |
Mass | 0.2022 g | 0.2224 g |
Volume | 22.6 cm3 | 26.0 cm3 |
Temperature | 13°C | 17°C |
Pressure | 765.2 mm Hg | 764.6 mm |
If beryllium is a divalent metal, the molecular formula of the product will be Be(C5H7O2)2; if it is trivalent, the formula will be Be(C5H7O2)3. Show how Combes’s data help to confirm that beryllium is a divalent metal.
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