l 13. If the pH of a solution decreased from 9 to 7, it means that a. [H+] has d
ID: 186832 • Letter: L
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13. If the pH of a solution decreased from 9 to 7, it means that a. [H+] has decreased 100 times what it was at the pH of 9 b. [OH-] has decreased 100 times what it was at the pH of 9 c. [H+] has increased 100 times what it was at the pH of 9 d. [OH-] has increased 100 times what it was at the pH of 9 e. Both A +D f. Both B and C 14. If the pH of a solution changes from pH 5 to pH 7, it means that the a. [H+] is 2 times greater than what it was at pH 5 b. [H+] is 2 times less than what it was at pH 5 c. [H+] is 100 times less than what is was at pH 5 e. [H+] is 100 times greater than what is was at pH 5Explanation / Answer
13) The correct option is "f" :- Both B and C
Because, if the pH of a solution decreased from 9 to 7, it loses its alkalinity ( OH- ions ) which also implies the acidity (H+ ions) of the solution has increased. That's why, the hydroxide (OH) ions decreased 100 times and also hydrogen (H) increased 100 times when the pH is at 9.
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