Mg(OH)2 5. Determine the product(s) of the strong acid-strong H2SO4 + KOH 6. The

Question

Mg(OH)2 5. Determine the product(s) of the strong acid-strong H2SO4 + KOH 6. The p of a solution with (H,0]-10x 10'M is b) 5 a) 9 d) -7 c) 7 7. The pH of a solution with [H,o]-1.0 x 10'M is b) -12 a) -2 d) 12 c) 7 [2pts] 8. Determine the pH of a solution with [OH] 1.0 x 10-9M 9. Determine the [H,0+] concentration for a solution with a pH =-1 .0 10.The addition of an acidic solution to a buffer solution of pH 9.3 will most likely result in the pH of the mixture of the two solutions being close to a) 14 b) 10.5 c) 9.2 d) 9.5 pH=-log[H30'] [H30'][OH] = 1.00 x 10" [H3O+] = 10-pH

Explanation / Answer

5) H2SO4 + 2KOH ----> K2SO4 + 2H2O

6) pH = -log ( 1.0 x 10^-5) => 5 ( option B)

7) pH = - log ( 1.0 x 10^2) => -2 ( option A)

8) [OH^-] = 1 x 10^-9 M

So [H^+] = 10^-14 / 10^-9 => 10^-5 M

pH = - log ( 1 x 10^-5) => 5

9) [H3O^+] = 10^-(-1)

[H3O^+] = 10 M

10) Answer : option c) 9.2

addition of acid to buffer will decrease pH to acidic side only small extent.

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