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Assoli18 [71]
3 years ago
6

Rank the following carboxylic acids by acid strength, with the strongest at the top and the weakest at the bottom. It may help t

o draw each Lewis structure. Drag and drop options into correct order.For keyboard navigation...SHOW MORE Press space or enter to grab A. CF3CO2H B. CHF2CO2HC. CH2FCO2H D. CH3CO2H
Chemistry
1 answer:
Vitek1552 [10]3 years ago
3 0

Answer:

$CF_3CO_2H> CHF_2CO_2H>CH_2FCO_2H>CH_3CO_2H$

Explanation:

Florine has the highest electronegativity and it thus pulls the element of $OH^- groups in the COOH group towards itself, making it relatively easy to loose the proton of the carboxyl group.

       F     O

       ↑     ||

 F← C ← C ← O - H             ,  Here three Florine withdraw

       ↓

       F

        F     O

       ↑     ||

 F← C ← C - O  H             ,  Here two Florine withdraw

       ↓

       H

        F   O

        |     ||

 H - C - C - OH             ,  Here one Florine withdraw

       ↓

       H

       H   O

        |     ||

 H - C - C - OH             ,  Here no Florine withdraw

        |

       H

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<h3>Answer:  b) 0.250 mol</h3>

============================================

Work Shown:

Using the periodic table, we see that

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These are approximations and these values are often found underneath the atomic symbol. For example, the atomic weight listed under carbon is roughly 12.011 grams. I'm rounding to 2 sig figs in those numbers listed above.

So 1 mole of CO2 is approximately 12+2*16 = 44 grams. The 2 is there since we have 2 oxygens attached to the carbon atom.

-------------------

Since 1 mole of CO2 is 44 grams, we can use that to convert from grams to moles.

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In short,

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This is approximate.

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