Coagulating power of ions for a positive or negative sol (Hardy-Schulze rule)

1. A.
   $[Fe(CN)_6]^{4-}$
2. B.
   $PO_4^{3-}$
3. C.
   $SO_4^{2-}$
4. D.
   $Cl^-$

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1. A.
   $\text{Fe(CN)}_6^{4-}$
2. B.
   $\text{Cl}^-$
3. C.
   $\text{SO}_4^{2-}$
4. D.
   $\text{PO}_4^{3-}$

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1. A.
   $[\text{Fe}(\text{CN})_6]^{4-}$
2. B.
   $\text{PO}_4^{3-}$
3. C.
   $\text{Ba}^{2+}$
4. D.
   $\text{Al}^{3+}$

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1. A.
   ${SO}_{4}^{2 -}$
2. B.
   ${Cl}^{-}$
3. C.
   ${PO}_{4}^{3 -}$
4. D.
   $\left\lbrack Fe(CN)_{6} \right\rbrack^{4 -}$

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1. A.
   $\mathrm{KNO_3}$
2. B.
   $\mathrm{K_2SO_4}$
3. C.
   $\mathrm{K_3PO_4}$
4. D.
   $\mathrm{K_4Fe(CN)_6}$

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1. A.
   $\mathrm{Cl^-}$
2. B.
   $[\mathrm{Fe(CN)_6}]^{4-}$
3. C.
   $\mathrm{PO_4^{2-}}$
4. D.
   $\mathrm{SO_4^{2-}}$

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1. A.
   $\mathrm{Na^+ > Ba^{2+} > Al^{3+}}$
2. B.
   $\mathrm{Cl^- > SO_4^{2-} > PO_4^{3-}}$
3. C.
   $\mathrm{Al^{3+} > Ba^{2+} > Na^+}$
4. D.
   $\mathrm{PO_4^{3-} > SO_4^{2-} > Cl^-}$

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1. A.
   $\mathrm{Na^+}$
2. B.
   $\mathrm{Zn^{++}}$
3. C.
   $\mathrm{Ca^{++}}$
4. D.
   $\mathrm{Al^{+++}}$

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