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vovangra [49]
3 years ago
5

Please Help ! Express the quantity 255000m in each unit. a. mm c. cm

Chemistry
1 answer:
ASHA 777 [7]3 years ago
7 0
255000000 mm
25500000 cm
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Which is the strongest acid listed in the table?
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Answer:

Hydrofluoric acid.

Explanation:

To know which of the acid is the strongest, let us determine the pka of each acid. This is illustrated below:

1. Acetic acid

Ka = 1.8x10^-5

pKa =..?

pKa = –logKa

pKa = –Log 1.8x10^-5

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2. Benzoic acid

Ka = 6.5x10^-5

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Ka = 6.8x10^-4

pKa =..?

pKa = –logKa

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4. Hypochlorous acid

Ka = 3.0x10^-8

pKa =..?

pKa = –logKa

pKa = –Log 3.0x10^-8

pKa = 7.52

Note: the smaller the pKa value, the stronger the acid.

The pka of the various acids as calculated above is given below:

Acid >>>>>>>>>>>>>>>>>> pKa

1. Acetic acid >>>>>>>>>> 4.74

2. Benzoic acid >>>>>>>> 4.18

3. Hydrofluoric acid >>>> 3.17

4. Hypochlorous acid >> 7.52

From the above illustration, we can see that hydrofluoric acid has the lowest pKa value. Therefore, hydrofluoric acid is the strongest among them.

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