Which of the following substances are likely to be soluble in water?
A)ZnS
b)Au2(CO3)3
C )PbCL2
d) MnO2
http://en.wikipedia.org/wiki/Solubility_table#P
Which of the following substances are likely to be soluble in water?
A)ZnS
b)Au2(CO3)3
C )PbCL2
d) MnO2
To determine the solubility of substances in water, we need to consider their chemical properties.
A) ZnS (Zinc sulfide):
Zinc sulfide is not soluble in water. It is an insoluble compound.
B) Au2(CO3)3 (Gold(III) carbonate):
Gold(III) carbonate is also likely to be insoluble in water. Carbonates of metals tend to be insoluble except for those of group 1 elements and ammonium.
C) PbCl2 (Lead(II) chloride):
Lead(II) chloride is soluble in water. Chlorides are typically soluble, unless they are paired with elements such as silver, lead, and mercury.
D) MnO2 (Manganese(IV) oxide):
Manganese(IV) oxide is insoluble in water. Metal oxides are generally insoluble in water, with a few exceptions.
Based on this information, the substance likely to be soluble in water is C) PbCl2 (Lead(II) chloride).
To determine which substances are likely to be soluble in water, we need to apply some solubility rules or guidelines. These rules are based on experimental observations and can help predict if a substance will dissolve in water or not. Here are the guidelines:
1. Rule of Solubility of Ionic Compounds: Most compounds containing alkali metal (Group 1) ions (Li+, Na+, K+, etc.) and ammonium ion (NH4+) are soluble. Also, most nitrates (NO3-), acetates (CH3COO-), and chlorates (ClO3-) are soluble.
2. Rule of Solubility of Common Halides: Chlorides (Cl-), bromides (Br-), and iodides (I-) are soluble, except for those of silver (Ag+), lead (Pb2+), and mercury (Hg2 2+). However, chlorides (Cl-) are also insoluble when combined with lead (Pb2+) or mercury (Hg2 2+), except for lead chloride (PbCl2).
3. Rule of Solubility of Common Sulfates: Sulfates (SO4 2-) are soluble, except for those of barium (Ba2+), strontium (Sr2+), calcium (Ca2+), silver (Ag+), and lead (Pb2+).
Now, let's evaluate each substance from the options you provided:
A) ZnS (Zinc sulfide): Generally, sulfides are insoluble, so ZnS is not likely to be soluble in water.
B) Au2(CO3)3 (Gold carbonate): Generally, carbonates are insoluble, except for those containing alkali metal ions (Li+, Na+, K+, etc.) and ammonium ion (NH4+). So, Au2(CO3)3 is not likely to be soluble in water.
C) PbCl2 (Lead(II) chloride): Chlorides are typically soluble, except for those of lead (Pb2+) and silver (Ag+). However, PbCl2 is an exception to the rule, and it is soluble in water.
D) MnO2 (Manganese dioxide): Oxides are generally insoluble in water, so MnO2 is not likely to be soluble.
Based on the solubility rules, the substances likely to be soluble in water are:
- PbCl2 (Lead(II) chloride)
Therefore, the correct answer is: C) PbCl2