LATIHAN SOAL ASAM BASA

What is the pH of a 0,10 M HC₄H₇O₂ solution ? The Ka of HC₄H₇O₂ is 1,5 x 10^-5

• 1,0

• 2,9

• 4,7

• 8,5

• 10,3

Which of the following will be acidic ?

• NaOH

• NH₃

• NaCl

• NH₄Cl

• CH₃CONH₂

Identify the conjugate pairs in the following reaction ?

HCHO₂ + CH₃NH₂ === CHO₂^- + CH₃NH₃⁺

• HCHO₂ / CH₃NH₂

• HCHO₂ / CHO₂^-

• CH₃NH₂ / CHO₂^-

• CHO₂^- / CH₃NH₃⁺

• None of the above are conjugate pairs

What is the conjugate acid of HPO₄^2- ?

• H₄PO₄⁺

• H₃PO₄

• H₂PO₄^-

• HPO₄^2-

• PO₄^3-

Which of the following is true about an aqueous solution of C₅H₅NHCl ?

• The solution is acidic due to the presence of C₅H₅NH⁺

• The solution is acidic due to the presence of HCl

• The solution is basic due to the presence of Cl^-

• The solution is basic due to the presence of C₅H₅N

• The solution is neutral because both ions are spectator ions

Berapakah pH sebuah buffer HC₂H₃O₂ dan NaC₂H₃O₂ jika konsentrasi keduanya sama ?

• 2,31

• 4,74

• 5,93

• 7,08

• 9,62

Dalam larutan dengan pH = 4,35 berapakah [H⁺] ?

• 6,7 x 10^-3 M

• 3,5 x 10^-4 M

• 4,5 x 10^-4 M

• 3,5 x 10^-5 M

• 4,5 x 10^-5 M

Berapakah [H⁺] dalam 0,15 M larutan asam asetat jika Ka = 1,8 x 10^-5 ?

• 1,1 x 10^-2 M

• 1,6 x 10^-3 M

• 1,2 X 10^-4 M

• 1,8 X 10^-5 M

• 2,7 X 10^-6 M

Which compound is the strongest acid in aqueus solution ?

• HOCN

• HOCl

• HOClO

• HOClO₂

• HOClO₃

What is the pH of a 0,002 M formic acid (HCOOH) solution ? (Ka HCOOH = 1,7 x 10^-4)

• 2,70

• 3,30

• 3,60

• 3,90

• 4,20