Which compound is insoluble in Water?

Which compound is insoluble in water? There are certain rules that we need to take note of before mentioning compounds that are insoluble in water.

Yes, solubility rule gives us a uide on how to determine compound that re solunle in water or

I will recap the most common solubility rules and I will mention specific compounds that are insoluble in water.

1. All nitrates are soluble

2. All sulphates are soluble except sulphates of Barium , Strontium, and lead

3.All chlorides, Bromides, Iodides are soluble except that of silver, mercury and lead

4.All fluorides are soluble except Fluorides of Magnesium, Calcium, Strontium, Barium and Lead

5.All chlorates, Perchlorates and acetates are soluble

6. All hydroxides are insoluble except hydroxides of Potassium, Sodium and Ammonium.

Which compound is insoluble in water?

I will like to discuss with examples the salts that are not soluble in water based on the solubility rule.

1. Insoluble Sulphates in water

The compounds that are insoluble in water are sulphates of Barium, Strontium and Lead

Example Barium sulphate(Bariou tetraoxosulphate Vi) BaSO₄, Strontium sulphate (Strontium tetraoxosulphate Vi) SrSO₄, Lead II teraoxosulphate VI (PbSO₄).

 Calcium sulphate is partially insoluble and partially soluble in water.

The amount insoluble in water is enough to fully classify it as insoluble compound.

Recall that solubility is the amount of a substance in mole or grams that will dissolve in I dm³  of a solvent.

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2. Insoluble chlorides in water

There are insoluble chlorides in water thus; silver chloride (AgCl), Mercury II chloride (HgCl₂) and lead II chloride (PbCl₂).

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3. Insoluble iodides in water

There are insoluble iodides in water thus silver iodide (AgI), mercury II iodide(HgI₂) and Lead II iodide (PbI₂).

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4. Insoluble Bromides in water

There are insoluble iodides in water thus silver bromide (AgBr), mercury II bromide(HgBr₂) and Lead II bromide (PbBr₂).

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5. Insoluble fluorides in water

There are fluorides that are insoluble in water thus; magnesium fluoride (MgF₂), Calcium Fluoride (CaF₂), Strontium bromide (SrBr₂), Barium Bromide (BaBr₂) and lead II bromide (PbBr₂).

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6. Insoluble hydroxides in water

These are insoluble hydroxides in water thus; Potassium hydroxide (KOH), sodium hydroxide (KOH0 and ammonium hydroxide (NH₄OH).

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7. All carbonates are insoluble except carbonates of sodium, potassium and ammonium

Examples of Insoluble carbonates;

Calcium carbonate (CaCO₃), Magnesium carbonate (MgCO₃), Aluminium carbonate (Al₂(CO₃)₂)_, Strontium carbonate (SrCO₃), Barium carbonate (BaCO₃), iron II carbonate (FeCO₃) etc

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Which compounds are soluble in water?

1. All nitrates are soluble in water example include potassium nitrate (KNO₃), sodium nitrate (NaNO₃), Calcium nitrate (Ca(NO₃)₂), magnesium nitrate (Mg(NO₃) Aluminum nitrate (Al(NO₃)₂ etc

2. Carbonates of sodium, Potassium and Ammonium are soluble

Sodium carbonate (Na₂CO₃),Potassium carbonate (K₂CO₃) and Ammonium carbonate (NH₄)₂CO₃ are soluble in water.

3.  Hydroxides of Sodium, Potassium and Ammonium are soluble in water

 Hydroxides of Sodium, Potassium and Ammonium are soluble in water thus sodium hydroxide(NaOH), Potassium hydroxide (KOH) and ammonium hydroxide (NH₄OH)

4. All chlorates, Perchlorates and acetates are soluble in water

Examples include Sodium Chlorate (NaClO₃), Potassium chlorate (KClO₃), Sodium acetate (CH₃COONa) , sodium perchlorate NAclO₄ etc

5. All sulphates are soluble except sulphates of Barium , Strontium, and lead

This implies that other sulpahres of metals are soluble in water example Na₂SO₄, Poatssium sulphate (K₂SO₄), Sodium sulphate (K₂SO₄) etc

6. All fluorides are soluble except Fluorides of Magnesium, Calcium, Strontium, Barium and Lead.

Examples of soluble fluorides are NaF, KF, AlF₃, etc

Summary of the soluble and insoluble compounds

Salts	Soluble	Insoluble
Nitrates	All soluble Ecamples are NaNO3, KNO3	Nil
Sulphates	All sulphates are soluble except that of Barium, strontium and lead	SrSO4, BasO4, PbSO4
Carbonates	Na2CO3, K2CO3, (NH4)2CO3	All carbonates are insoluble except that of potassium, sodium and ammonium
Flourides	All fluorides are soluble except Fluorides of Magnesium, Calcium, Strontium, Barium and Lead	MgF2, CaF2, SrF3,BaF3, PbF2
Chlorides	All chlorides, Bromides, Iodides are soluble except that of silver, mercury and lead	AgCl, HgCl2, PbCl2
Clorates, Prchlorates and Acetates	All chlorates, Perchlorates and acetates are soluble	Nil
Hydroxides	NaOH, KOH, NH4OH	All hydroxides are insoluble except that of potassium, sodium and ammonium

So, with these guidelines  stated and explained  the question ‘which compound is insoluble in water ‘ has been well answered.