Match each of the following carboxylic acids to their appropriate pKa values (5.0, 0.2 and 2.7): (A) FCH2COOH (B) (CH3)3CCOOH (C) CF3COOH

Explanation:

Higher the acidic strength  , lower the pKa value.

Among the given acids , CF₃COOH is most acidic because of 3  fluorine atom attached with carbon . fluorine is highly electro-negative electron withdrawing group .

So , acidic strength of given acids will decrease as follows

CF₃COOH > FCH₂COOH > (CH3)₃CCOOH

Hence CF₃COOH will have least pka value ie 0.2

pka value of FCH₂COOH will be 2.7

pka value of (CH3)₃CCOOH will be 5.0

yes they ca   is ur ansswerrr

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml