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Problem- When each of the following pairs of aqueous solutions is mixed, does a precipitation reaction occur? If so, write the formula and name of the precipitate. (Type "NONE" in the blanks if there is no precipitation reaction.)
(a) Potassium carbonate + barium hydroxide
(b) Sodium nitrate + copper(II) sulfate
(c) Potassium chloride + iron(II) nitrate
(d) Aluminum nitrate + sodium phosphate
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