Predict whether the following compounds are soluble or insoluble in water.

The way you can tell if an ionic compound is soluble or insoluble is knowing the "Solubility Rules". You should have them in your textbook or maybe a PowerPoint or handout from your teacher. They are usually in a chart form, most often the first half of the chart talks about Soluble stuff... It will say "all compounds with NO3- in them are soluble" (or something like that). Then there is usually a column in the table that lists exceptions to the rule, if there are any.

In the case of compounds containing the nitrate anion (NO3-) there are no exceptions. Therefore, if you see any compound with this ion in it, you can assume that it will be soluble, no matter what the cation - Li+, K+, Pb+2, Fe+3, Cr+3, Ba+2, Ag+, Ca+2, etc. any cation, it doesn't matter, these will be soluble if combined with the nitrate anion!

However, the solubility rules also say that "all chlorides, bromides, and iodides are soluble, except..." Which means if you have a compound containing Cl-, Br-, or I-, you should assume that it is soluble. unless it is one of the exceptions! The exceptions listed for these are Pb+2, Ag+, and Hg2+2 (diatomic mercury cation). This means NaCl would be soluble (because it's not an exception to the solubility rule) but PbCl2 would be insoluble (because it is an exception to the solubility rule).

The rules also have a general list of things that are usually Insoluble. These basically work the opposite - if you see those ions in a compound you should assume that it is NOT soluble (Insoluble means not soluble). Unless it is an exception! Or something already discussed in the Solubility rules that doesn't have an exception... For example, they would usually say something about sulfates generally being insoluble, so if your compound contains SO4-2 ion, you should assume it is not soluble. However, an exception to this rule is Mg2+ ion combined with it, so MgSO4 would be soluble! Also, in your solubility rules, in the Soluble part, it probably said "All compounds containing Na+, Li+, K+ or NH4+ are soluble", so if you have any of these cations combined with sulfate, then it is still going to be soluble, because these guys are exceptions to all of the Insoluble compound rules.

Sometimes your teacher will let you have a copy of the Solubility Rules when you take your test, so you don't necessarily have to memorize them. But you definitely need to know how to use the chart/list!

Predict whether the following compounds are soluble or insoluble in water.

1. PbClz

2. NiCO{eq}_3 {/eq}

3. CuBr{eq}_2 {/eq}

4. KNO{eq}_3 {/eq}

5. BasO{eq}_4 {/eq}

6. Pb(NO{eq}_3 {/eq}){eq}_2 {/eq}

• Salts the consist of chloride, bromide, and iodide ions are insoluble.
• Salts containing group I elements are soluble.
• Silver salts are insoluble.
• Sulfate salts are soluble.

Predict whether each of the following compounds is soluble or insoluble in water.

a. {eq}CuBr_2 {/eq}

b. {eq}PbCl_2 {/eq}

c. {eq}CuCO_3 {/eq}

d. {eq}NH_4Br {/eq}

The solubility of an ionic compound in liquid water is its relative ability to fully dissociate into an aqueous solution of its constituent ions. This dissociation reaction has a stoichiometry derived from the compound's uncharged formula unit. The resulting product ions are identified to predict the relative solubility of the compound, with calculations usually not required.

Answer and Explanation: 1

The question lists formula units for 4 different ionic compounds. We write the dissociation reaction of each compound in water to identify its...

See full answer below.

predict whether the following compounds are soluble or insoluble in water?

Concepts and reason
The problem is based on the concept of solubility of compounds. In an aqueous solution, compound is soluble if it gets completely dissociated into its constituent atoms. For example, NaCl is soluble in water because it exists as

Fundamentals
The property of solubility is defined as any gaseous, liquid or solid substance dissolved in any solvent that is, gaseous, solid or liquid. There are various compounds that can be soluble in any one like liquid and can be insoluble in the other compound like gas. Therefore, different compounds have different solubility in various solvents like water.

Answer:

All the

In water, the molecules of the compounds are soluble and so they would dissociate into their ionic forms. Therefore, if the ions would dissociate then, they are soluble in the solvent otherwise, they are insoluble.