Chapter 5: Problem 153

Which one of these four molecules contains a triple bond: \(\mathrm{F}_{2}, \mathrm{O}_{3}, \mathrm{HCN}\), or \(\mathrm{H}_{2} \mathrm{CO}\) ?

Short Answer

Expert verified

The molecule that contains a triple bond among the given options is \(HCN\). In this molecule, Carbon and Nitrogen share three pairs of electrons, forming a triple covalent bond.

Step by step solution

Identify the Elements

Before analyzing each molecule for triple bonds, first, identify the elements in each molecule: - Molecule 1: \(F_{2}\): This molecule contains Fluorine. - Molecule 2: \(O_{3}\): This molecule contains Oxygen. - Molecule 3: \(HCN\): This molecule contains Hydrogen, Carbon, and Nitrogen. - Molecule 4: \(H_{2}CO\): This molecule contains Hydrogen, Carbon, and Oxygen.

Examine the Covalent Bonds

Covalent bonds occur between non-metal elements. Non-metals have high electronegativity and prefer sharing electrons rather than donating or accepting them. In a single covalent bond, one pair of electrons is shared between two atoms. In a double covalent bond, two pairs of electrons are shared. In a triple bond, three pairs of electrons are shared. - \(F_{2}\) forms a single bond, - \(O_{3}\), also known as Ozone, forms a double bond, - \(H_{2}CO\), also known as Formaldehyde, forms a double bond.

Identify the Triple Bond

With the remaining molecule, \(HCN\), you can identify Hydrogen forms a single bond, leaving the Carbon and Nitrogen atom to form the bond. Remembering the third type of covalent bond, the triple bond occurs when three pairs of electrons are shared between two atoms. Carbon and Nitrogen in the molecule \(HCN\) do exactly this. They form a triple bond. Hence, \(HCN\) is the molecule which has a triple bond. So, the answer is \(HCN\).

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Which one of these four molecules contains a triple bond: \(\mathrm{F}_{2}, \mathrm{O}_{3}, \mathrm{HCN}\), or \(\mathrm{H}_{2} \mathrm{CO}\) ?

Short Answer

Step by step solution

Identify the Elements

Examine the Covalent Bonds

Identify the Triple Bond

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