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Chapter 4: 4.8 P (page 178)

Why are some covalent compounds soluble in water and others are not?

Short Answer

Expert verified

The covalent compounds which do not contain any polar bonds are insoluble in water. Covalent compounds which contain polar bonds are soluble in water.

Step by step solution

01

Define the Covalent compounds

Covalent compounds are formed by covalent bonding between two or more atoms.A covalent bond between two atoms is formed by the equal sharing of electrons from both atoms. The pair of electrons which participates in bonding is called a shared pair or bonding pair. The sharing of electrons can be done between the same kind of atoms or between different kinds of atoms.

02

Determine the solubility of covalent compounds in water

Covalent compounds do not dissociate into ions as ionic compound does but some covalent compound contain polar bonds in their molecules due to which they become soluble in water like sugar, alcohol, etc. butmost of the covalent compounds which do not contain any polar bonds are insoluble in water like benzene, octane, etc.

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Most popular questions from this chapter

Predict the product(s) and write a balanced equation for each of the following redox reactions:

(a) Pentane (C5H12) + Oxygen →

(b) Phosphorus trichloride + Chlorine →

(c) Zinc + Hydrobromic acid →

(d) Aqueous Potassium iodide + Bromine →

(e) Write a balanced net ionic equation for (d).

When each of the following pairs of aqueous solutions is mixed, does a precipitation reaction occur? If so, write balanced molecular, total ionic, and net ionic equations:

(a) Sodium sulfide + nickel (II) sulfate

(b) Lead (II) nitrate + potassium bromide

Limestone (CaCO3) is used to remove acidic pollutants from smokestack flue gases. It is heated to form lime (CaO), which reacts with sulfur dioxide to form calcium sulfite. Assuming a 70.% yield in the overall reaction, what mass of limestone is required to remove all the sulfur dioxide formed by the combustion of 8.5104 kg of coal that is 0.33 mass % sulfur?

How many total moles of ions are released when each of the following samples dissolves completely in water?(a) 0.75 mol ofK3PO4 (b) 6.88×10-3g ofNiBr2.3H2O (c) 2.23×1022formula units ofFeCl3

Use the oxidation number method to balance the following equations by placing coefficients in the blanks. Identify the reducing and oxidizing agents:

(a)_KOH(aq)+_H2O2(aq)+_Cr(OH)3(s)→_K2CrO4(aq)+_H2O(l)(b)_MnO4−(aq)+_ClO2−(aq)+_H2O(l)→_MnO2(s)+_ClO4−(aq)+OH−(aq)(c)_KMnO4(aq)+_Na2SO3(aq)+_H2O(l)→_MnO2(s)+_Na2SO4(aq)+_KOH(aq)(d)_CrO42−(aq)+_HSnO2−(aq)+_H2O(l)→_CrO2−(aq)+_HSnO3−(aq)+OH−(aq)(e)_KMnO4(aq)+_NaNO2(aq)+_H2O(l)→_MnO2(s)+_NaNO3(aq)+_KOH(aq)(f)_I−(aq)+_O2(g)+_H2O(l)→_I2(s)+_OH−(aq)
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