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Solubility rules: Answers to lab. Br – Cl – CO 3 2– NO 3 – OH – PO 4 3– SO 3 2– SO 4 2– Ag + XXXXXX Al 3+ XXXX Ba 2+ XXXX Ca 2+ XXX Co 2+ XXXX Cu 2+ XXXX.

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Presentation on theme: "Solubility rules: Answers to lab. Br – Cl – CO 3 2– NO 3 – OH – PO 4 3– SO 3 2– SO 4 2– Ag + XXXXXX Al 3+ XXXX Ba 2+ XXXX Ca 2+ XXX Co 2+ XXXX Cu 2+ XXXX."— Presentation transcript:

1 Solubility rules: Answers to lab

2 Br – Cl – CO 3 2– NO 3 – OH – PO 4 3– SO 3 2– SO 4 2– Ag + XXXXXX Al 3+ XXXX Ba 2+ XXXX Ca 2+ XXX Co 2+ XXXX Cu 2+ XXXX Fe 3+ XXXX K+K+ Na + Ni 2+ XXXX NH 4 +

3 Answers Alkali metals (IA) 2. NH NO 3 – 4. Br –, Cl –, SO 4 2– 5.NO 3 – 6. Na + or K + or NH Ag 3 PO 4 AlPO 4 Ba 3 (PO 4 ) 2 Ca 3 (PO 4 ) 2 Co 3 (PO 4 ) 2 Cu 3 (PO 4 ) 2 FePO 4 Ni 3 (PO 4 ) 2 8.Ca(NO 3 ) 2 Soluble rule 2 FeCl 3 Soluble rule 3 Ni(OH) 2 Insoluble rule 5 AgNO 3 Soluble rule 2 BaSO 4 Insolublerule 4 CuCO 3 Insolublerule 6

4 Answer 9 You have a mixture of Ba 2+, Pb 2+, Cu 2+, Na + Which can be precipitated without the others? Use Cl –, Br –, or I – to precipitate Pb 2+ (rule 3) Filtering leaves Ba 2+, Cu 2+, Na + Use SO 4 2– to precipitate Ba 2+ (rule 4) Filtering leaves Cu 2+, Na + Use OH – (rule 5), or any of PO 4 3–, CO 3 2–, SO 3 2–, S 2– (rule 6) to precipitate Cu 2+ Since all Na + compounds are soluble, this will stay in solution

5 Determining net ionic reactions Step 1:Write formula for reactants and products using valences. Products are determined by switching +ve and –ve. Step 2:Determine if any products are insoluble (use solubility rules). Note: all reactants must be soluble (i.e. aq) in order to mix. If all products are aqueous: no reaction Step 3:Balance the equation Step 4:Write the ionic equation Step 5:Write the net ionic equation E.g. sodium phosphate + calcium chloride

6 Answers: 10 i) and ii) i) (NH 4 ) 2 S(aq) + Pb(NO 3 ) 2 (aq) PbS(s) + 2NH 4 NO 3 (aq) 2NH 4 + (aq) + S 2– (aq) + Pb 2+ (aq) + 2NO 3 – (aq) PbS(s) + 2NH 4 + (aq) + 2NO 3 – (aq) Net: S 2– (aq) + Pb 2+ (aq) PbS(s) ii) Co(NO 3 ) 2 (aq) + Na 2 SO 4 (aq) No reaction Step 1:Write correct formulas Step 2:Determine if any products are insoluble Step 3:Balance the equation Step 4:Write the ionic equation Step 5:Write the net ionic equation

7 Answers: 10 iii) - vi) iii)AgNO 3 (aq) + NaI(aq) AgI(s) + NaNO 3 (aq) Ag + (aq) + NO 3 – (aq) + Na + (aq) + I – (aq) AgI(s) + Na + (aq) + NO 3 – (aq) Net: Ag + (aq) + I – (aq) AgI(s) iv)Al(NO 3 ) 3 (aq) + 3KOH(aq) Al(OH) 3 (s) + 3KNO 3 (aq) Al 3+ (aq) + 3NO 3 – (aq) + 3K + (aq) + 3OH – (aq) Al(OH) 3 (s) + 3K + (aq) + 3NO 3 – (aq) Net: Al 3+ (aq) + 3OH – (aq) Al(OH) 3 (s) v) Zn(NO 3 ) 2 (aq) + K 2 CO 3 (aq) ZnCO 3 (s) + 2KNO 3 (aq) Zn 2+ (aq) + 2NO 3 – (aq) + 2K + (aq) + CO 3 2– (aq) ZnCO 3 (s) + 2K + (aq) + 2NO 3 – (aq) Net: Zn 2+ (aq) + CO 3 2– (aq) ZnCO 3 (s) vi)KCl(aq) + NaNO 3 (aq) No reaction For more lessons, visit


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