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Chapter 4: Q4.7P (page 178)

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

Short Answer

Expert verified

ANSWER:

Those ionic compounds which have a strong ionic bond, does not soluble in water.

Step by step solution

01

Ionic compounds and their solubility in water 

:In an ionic solid, the oppositely charged ions are held next to each other by electrostatic attraction. Water separates the ions by replacing that attraction with one between the water molecules and the ions.

02

Step 2:

Step 2:Since the ionic compounds and the watermolecules are polar in nature therefore both attract each other by the force of attraction.Most ionic compounds dissociate and dissolve in water easily but if the force of attraction between ions of the ionic compound is stronger than the attraction force of water then its ionic bond does not dissociate and hence, these types of ionic compounds become water-insoluble.

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Most popular questions from this chapter

Question: In a car engine, gasoline (represented by C8H18) does not burn completely, and some CO, a toxic pollutant, forms along with CO2 and H2O. If 5.0% of the gasoline forms CO:

(a) What is the ratio of CO2 to CO molecules in the exhaust?

(b) What is the mass ratio of CO2 to CO?

(c) What percentage of the gasoline must form CO for the mass ratio of CO2 to CO to be exactly 1/1?

Question: State a general equation for a neutralization reaction.

When either a mixture of NO and Br2 or pure nitrosyl bromide (NOBr) is placed in a reaction vessel, the product mixture contains NO, Br2, and NOBr. Explain.

Carbon dioxide is removed from the atmosphere of space capsules by reaction with a solid metal hydroxide. The products are water and the metal carbonate.

(a) Calculate the mass of CO2that can be removed by reaction with 3.50 kg of lithium hydroxide.

(b) How many grams of CO2 can be removed by 1.00 g of each of the following: lithium hydroxide, magnesium hydroxide, and aluminum hydroxide?

There are various methods for finding the composition of an alloy (a metal-like mixture). Show that calculating the mass % of Mg in a magnesium-aluminum alloy (d = 2.40 g/cm3) gives the same answer (within rounding) using each of these methods:

(a) a0.263-gsampleofalloy(dofMg=1.74g/cm3;dofAl=2.70g/cm3);

(b) an identical sample reacting with excess aqueous HCl forms 1.38x10-2molofH2;

(c) an identical sample reacting with excess O2 forms 0.483 g of oxide.
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