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QuestionChemistry

What type of bond exists between hydrogen and chlorine in HCl (hydrochloric acid)? How do you know this?
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Answer

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Step 1:
I'll solve this chemistry problem following the specified formatting guidelines:

Step 2:
: Identify the Elements

Hydrogen (H) and Chlorine (Cl) are the two elements in HCl. To determine the type of bond, we need to examine their electronic properties.

Step 3:
: Analyze Electronegativity

\text{Electronegativity of Hydrogen} = 2.20
\text{Electronegativity of Chlorine} = 3.16

Step 4:
: Calculate Electronegativity Difference

\Delta\text{Electronegativity} = |3.16 - 2.20| = 0.96

Step 5:
: Determine Bond Type

An electronegativity difference between 0.5 and 1.7 indicates a polar covalent bond. This occurs when electrons are shared unequally between atoms.

Step 6:
: Explain Bonding Mechanism

In HCl, chlorine is more electronegative than hydrogen. This means the shared electron pair will be pulled closer to the chlorine atom, creating a slight negative charge on chlorine and a slight positive charge on hydrogen.

Final Answer

HCl forms a polar covalent bond, where electrons are shared unequally between hydrogen and chlorine due to their electronegativity difference of 0.96.