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Chapter 14: Q14.95P (page 623)

Question: Assuming acid strength relates directly to the electronegativity of the central atom, rank H3PO4,HNO3 , and H3ASO4 in order of increasing acid strength.

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01

Definition of Electronegativity

Electronegativity of an atom is defined as the tendency of an atom to attack the electrons.

In the periodic table as we move from right to left in a period electronegativity goes on increasing. While in a group as we move downward electronegativity is decreases. This is the general trend found in the periodic table. The relation of acidic character with electronegativity is as follows;

Electronegativity αacidic character

02

Acidic strength of given acid

The relation of acidic character with electronegativity is as follows;

Electronegativity∞ acidic character

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Most popular questions from this chapter

The interhalogen IF undergoes the reaction depicted below (I is purple and F is green):

(a) Write the balanced equation.

(b) Name the interhalogen product.

(c) What type of reaction is shown?

(d) If each molecule of IF represents 2.50×10-3mol, what mass of each product forms?

In addition to those in Table 14.3, other less stable nitrogen oxides exist. Draw a Lewis structure for each of the following:

(a) N2O2, a dimer of nitrogen monoxide with an N-Nbond.

(b) N2O2, a dimer of nitrogen monoxide with no N-Nbond.

(c) N2O3with no N-Nbond.

(d) NO+ and NO3− , products of the ionization of liquid N2O4.

Nearly every compound of silicon has the element in the +4oxidation state. In contrast, most compounds of lead have the element in the +2state.

(a) What general observation do these facts illustrate?

(b) Explain in terms of atomic and molecular properties.

(c) Give an analogous example from Group3A(13).

Bromine monofluoride (BF) disproportionates to bromine gas and bromine tri- and pentafluorides. Use the following to find ΔHorxnfor the decomposition of BrF to its elements:

3BrF(g)→Br2(g)+BrF3(l)ΔHorxn=-125.3KJ\hfill5BrF(g)→2Br2(g)+BrF5(l)ΔHorxn=-166.1KJ\hfillBrF3(l)+F2→(g)BrF5(l)ΔHorxn=-158.0KJ\hfill

Question: Draw a Lewis structure for

  1. The cyclic silicate ion Si4O12-8
  2. A cyclic hydrocarbon with formula C4H8
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