Question

Which of the following acids is the STRONGEST? The acid is followed by its K _a value.

		HC 2H 3O 2, 1.8 × 10 -5
		C 6H 5CO 2H, 6.3 × 10 -5
		HBrO, 2.3 × 10 -9
		HIO, 2.3 × 10 -11
		HClO, 2.9 × 10 -8

Answer 1

Kaal.&X 105 Son=) which of the following aids is the strongest The cuid is followed by its ka value. =) correct.option is Esplanation - I) calculate pka value of these adds from its ka value. =) pka =- :. pka -log (1.8 x 10 pka = 4.74 b) CGHS CO2H, ka=6:3x205 Pka = -log (6.3x105, pka = 4:20 -log ka. ng pka c) HBrO, ka = 2:3x10 Pka-tog (2.3 X 10 8.64 d) HIO, ka=2.3x1041 Pku = -log(2:3X10 2,3 x264 pka = 10.64

-8 Pka e) Holo, Ka=2.98 10 Pka = -log (2.9 x 10 168 = 7.54 smaller the pka value, the stronger the ceid. f higher the pka value, the weaker the ceid. >> Henee culording to this f above calculations Smaller Pke value is 4:20 & cuid is CHSCORH. = Henee . CEHSC024 is the strongest ceid of correet option is cb);