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floreschachi8230
04.02.2021 •
Chemistry
Which structure is the sun located
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Ответ:
Ответ:
Explanation:
C₈H₆Cl₂O₃
mol weight
= 8 x 12 + 6 x 1 + 35.5 x 2 + 3 x 16
96 + 6 + 71 + 48 = 221 g
230 g = 230 / 221 mol = 1.04 M solution
pKa = 2.73
Ka = 10⁻²°⁷³
= 1.86 x 10⁻³
Let the compound be represented by KH
KH = K⁻ + H⁺
a 0 0
a - x x x
x ² / (a - x) = Ka
x² / (1.04 - x) = .00186
x is very small so 1.04 - x = 1.04
x² / 1.04 = .00186
x² = .0019344
x = .044
= 44 x 10⁻³
[ H⁺ ] = 44 x 10⁻³
pH = - log ( 44 x 10⁻³)
= 3 - log 44
= 1.35