Multiple Choice
In the reaction between Pb(NO3)2 and MgSO4 in aqueous solution, which product forms a precipitate?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
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Which one of the following compounds will dissociate into the largest number of ions when dissolved in water?
A
KCl
B
Na$_2$SO$_4$
C
Na$_3$PO$_4$
D
CaCl$_2$
Verified step by step guidance1
Identify the formula of each compound and determine how many ions each produces upon dissociation in water.
For KCl, it dissociates into K$^+$ and Cl$^-$ ions, so it produces 2 ions in total.
For Na$_2$SO$_4$, it dissociates into 2 Na$^+$ ions and 1 SO$_4^{2-}$ ion, producing 3 ions in total.
For Na$_3$PO$_4$, it dissociates into 3 Na$^+$ ions and 1 PO$_4^{3-}$ ion, producing 4 ions in total.
For CaCl$_2$, it dissociates into 1 Ca$^{2+}$ ion and 2 Cl$^-$ ions, producing 3 ions in total.
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