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Leona [35]
3 years ago
13

Water molecules have a polarity, which allows them to be electrically attracted to other water molecules and other polar molecul

es by weak chemical bonds known as _____. View available hint(s)

Chemistry
1 answer:
-BARSIC- [3]3 years ago
4 0
<h3>Answer:</h3>

            Water molecules have a polarity, which allows them to be electrically attracted to other water molecules and other polar molecules by weak chemical bonds known as <u>Hydrogen Bond</u>.

<h3>Explanation:</h3>

                     Hydrogen Bond Interactions are those interactions which are formed between a <em>partial +ive</em> hydrogen atom bonded directly to most electronegative atoms (i.e. Fluorine, Oxygen and Nitrogen) of one molecule interacts with the <em>partial -ive</em> most electronegative atom of another molecule. These interactions are considered the strongest intermolecular interactions and are responsible for many stronger physical properties of water like, boiling point, viscosity, solubility e.t.c.

                       Attached figure shows the hydrogen bond interactions (green dashed lines) between water molecules. The partial charges are shown in red color.

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What is the percent ionization of a 1.8 M HC2H3O2 solution (Ka = 1.8 10-5 ) at 25°C?
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B) 0.32 %

Explanation:

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K_{a}=1.8\times 10^{-5}

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Considering the ICE table for the dissociation of acid as:-

\begin{matrix}&CH_3COOH&\rightleftharpoons &CH_3COOH&+&H^+\\ At\ time, t = 0 &1.8&&0&&0\\At\ time, t=t_{eq}&-x&&+x&&+x\\ ----------------&-----&-&-----&-&-----\\Concentration\ at\ equilibrium:-&1.8-x&&x&&x\end{matrix}

The expression for dissociation constant of acid is:

K_{a}=\frac {\left [ H^{+} \right ]\left [ {CH_3COO}^- \right ]}{[CH_3COOH]}

1.8\times 10^{-5}=\frac{x^2}{1.8-x}

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8 0
3 years ago
Normally the capital ÎGo° for a reaction would be determined at standard temperature with each reactant at a concentration of 1
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Answer:

d.-379 cal/mol

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Option d is the nearest answer .

8 0
3 years ago
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