A solution with [ ] of 5 × has a pH of ________.
A)2.3
B)-2.3
C)11.7
D)7.0
E)5.0

Question

A solution with [  ] of 5 ×  has a pH of ________.
A)2.3 
B)-2.3 
C)11.7 
D)7.0 
E)5.0

Quizplus · Accepted Answer

The given chemical formula suggests that we are dealing with an acid-base reaction between a protonated form [11ea71d0_de50_9328_91e5_93541b11b40c_TB6077_11] (acid) and a deprotonated form [11ea71d0_de50_9329_91e5_bf909a9d2505_TB6077_11] (base). The protonated form has a lower pH than the deprotonated form. Since the resulting solution is coming from the base, we know that the pH is higher than 7.0 (neutral pH of water), making choices A and B incorrect. Furthermore, since we are combining a strong acid and a strong base, we expect the resulting solution to have a pH of around 7.0, making choice E also incorrect. Therefore, the only viable option is choice C, which represents a pH of 11.7.

A Solution with [ ] of 5 ×