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3 years ago

What is the poh of an aqueous solution at 25.0 °c that contains 1.35 × 10-8 m hydroxide ion?

Chemistry

1 answer:

ohaa [14]3 years ago

8 0

POH is defined as the negative log base ten of the concentration of base. You have the concentration.

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How can the requirements of Na (sodium) solve the requirements of Cl (chloride) instability achievement?

Paul [167]

Na releases 1 electron to be stable

Cl requires 1 electron to be stable

both are ionic bonded to be stable

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2 years ago

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Aliun [14]

The answer is the 3rd one

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3 years ago

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Which is more volatile benzene or toluene?

oee [108]

Benzene is more volatile.

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3 years ago

g If a small amount of a strong acid is added to a buffer made up of a weak acid, HA, and the sodium salt of its conjugate base,

ikadub [295]

Answer:

Explanation is in the answer

Explanation:

The pH of the buffer solution does not change appreciably because the strong acid (free H⁺) reacts with conjugate base of buffer producing more weak acid. pH formula of buffers is (Henderson-Hasselbalch formula):

pH = pKa + log ( [A⁻] / [HA] )

The addition of strong acid decreases [A⁻] increasing [HA]. pH change just in the log of the ratio of [A⁻] with [HA], that is a real little effect over pH of the buffer solution.

5 0

3 years ago

Would you expect the carbonyl carbon of benzaldehyde to be more or less electrophilic than that of acetaldehyde? Explain using r

Slav-nsk [51]

Answer:

Benzaldehyde is less electrophilic than acetaldehyde

Explanation:

Electrophilicity of carbonyl carbon depends on it's positive charge density.

In benzaldehyde, phenyl group can act as an electron donating group towards carbonyl group due to it's electron donating resonating effect.

In acetaldehyde, methyl group can act as an electron donating group towards carbonyl group due to it's electron donating inductive effect.

We know that resonating effect are more stronger than inductive effect.

Henece, it is expected that positive charge density on carbonyl carbon is much lower in benzaldehyde than acetaldehyde.

So, benzaldehyde is less electrophilic than acetaldehyde.

Resonating effect of phenyl group has been shown below.

4 0

3 years ago