um 36. Using the chart to determine solubility, write a net ionic equation that

Question

um 36. Using the chart to determine solubility, write a net ionic equation that produces a precipitate for the reaction: Ca+2(aq) + PO-(aq) Ca(POJ(s) a. b. CaBr2(aq) +K' (aq) KCaBr2 (s) d. 3C2" + 2 PO'(aq) + Cas(PO4)2(s) TABLE I 6.3 THE SOLuBILITY OF IONIC COMPOUNDS IN WATER Compound Water soluble Nitrates Chlorides, bromides, NaC Example Exceptions Example AgNO None None Those containing AgAgCl Pb2+, or Hg2+ Those S2t, Ba+, or Hg2 iodides Sulfates K SO4 containin Water insoluble NaOH Those containing alkali metal cations, Ca2+ S2+, or Ba Hydroxides Mg(OH)2 Those containing NH4LiPO4 or alkali metal cations Phosphates FePO4 Those containing NH4K2CO or alkali metal cations PbCO Carbonates

Explanation / Answer

Q1

precipitate can be formed only for phosphate ions, since it is typically the one which is precipitate

most Group II metals, such as Mg2+, Ca2+, precipiate with PO4-3

then

Ca2+(aq) + PO4-3(aq ) --> Ca3(PO4)2(s)

balance

3Ca2+(aq) + 2PO4-3(aq ) --> Ca3(PO4)2(s)

from the list, if net ionic, then choose D alone

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