Question #7ba2d

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Question #7ba2d

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Answer 1 · 2015-12-27T19:22:23

$i .$ $i.$ $B a^{2 +} + C O_{3}^{2 -} \to B a C O_{3} (s) ⏐ ⏐ ↓$ $Ba^(2+) + CO_3^(2-) rarr BaCO_3(s)darr$

$i i .$ $ii.$ $C a^{2 +} + H P O_{4}^{2 -} \to C a H P O_{4} (s) ⏐ ⏐ ↓$ $Ca^(2+) + HPO_4^(2-) rarr CaHPO_4(s)darr$

Explanation:

All carbonates are insoluble (except for the obvious exceptions, which are?). Calcium biphosphate is about as soluble as a brick ( $< 20 \times 10^{- 3} g \cdot L^{- 1}$ $< 20 xx 10^(-3) g*L^-1$ ).

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