Which is/are not soluble in water?
(I) NaOH
(II) BaCO3
(III) AgCl
(IV) (NH4)3PO4
(V) FeCl2
1. (I) only
2. (III) only
3. (V) only
4. (II) and (III)
5. (II) and (V)
Is it 2. (III) only?
Since when is barium carbonate soluble?
http://en.wikipedia.org/wiki/Solubility_table#B
To determine which compounds are soluble or insoluble in water, we can use solubility rules. These rules guide us in predicting whether a compound will dissolve in water based on the combination of ions it contains.
Let's evaluate each compound:
(I) NaOH: Sodium hydroxide is a strong base and is highly soluble in water. Therefore, NaOH is soluble.
(II) BaCO3: Barium carbonate is insoluble in water. Carbonates (CO3^2-) are generally insoluble, except for those of group 1 elements (such as Na+ and K+) and ammonium ion (NH4+).
(III) AgCl: Silver chloride is insoluble in water. Chlorides (Cl-) are typically soluble, but silver chloride is an exception and is considered insoluble.
(IV) (NH4)3PO4: Ammonium phosphate is soluble in water. Ammonium salts are typically soluble.
(V) FeCl2: Iron(II) chloride is soluble in water. Most chlorides, including FeCl2, are soluble.
Based on this information, the compound that is not soluble in water is (III) AgCl. Therefore, the correct answer is 2. (III) only.