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Anastasy [175]
3 years ago
7

An induced dipole occurs when one molecule with a permanent dipole repels another molecule's electrons, causing the electrons to

be more concentrated on one end of the molecule than another.
True
False
Chemistry
2 answers:
Strike441 [17]3 years ago
8 0
Answer to the question is, true
BaLLatris [955]3 years ago
7 0

Answer:

True

Explanation:

Dipole-dipole interaction:-

This is the interaction between the two dipoles in the molecule which is formed by varying electronegativities.

Induced dipole-dipole interaction:-

These interactions results between the interactions of a permanent dipole and an induced dipole. The permanent dipole when reaches a molecule's proximity, causes the electrons to pull itself and making it a temporary dipole and thus, results in these kind of interactions.

Hence, the given statement is true.

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A chemistry graduate student is given 125.mL of a 0.20M acetic acid HCH3CO2 solution. Acetic acid is a weak acid with =Ka×1.810−
Over [174]

Answer : The mass of sodium acetate is, 1.097 grams.

Explanation : Given,

The dissociation constant for acetic acid = K_a=1.8\times 10^{-5}

Concentration of acetic acid (weak acid)= 0.20 M

volume of solution = 125. mL

pH = 4.47

First we have to calculate the value of pK_a.

The expression used for the calculation of pK_a is,

pK_a=-\log (K_a)

Now put the value of K_a in this expression, we get:

pK_a=-\log (1.8\times 10^{-5})

pK_a=5-\log (1.8)

pK_a=4.74

Now we have to calculate the concentration of sodium acetate (conjugate base or salt).

Using Henderson Hesselbach equation :

pH=pK_a+\log \frac{[Salt]}{[Acid]}

Now put all the given values in this expression, we get:

4.47=4.74+\log (\frac{[Salt]}{0.20})

[Salt]=0.107M

Now we have to calculate the mass of sodium acetate.

\text{Concentration}=\frac{\text{Mass of }NaCH_3CO_2\times 1000}{\text{Molar mass of }NaCH_3CO_2\times \text{Volume of solution (in mL)}}

0.107M=\frac{\text{Mass of }NaCH_3CO_2\times 1000}{82g/mol\times 125mL}

\text{Mass of }NaCH_3CO_2=1.097g

Therefore, the mass of sodium acetate is, 1.097 grams.

6 0
4 years ago
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