pH range Description 0 to 3 strongly acidic 4 to 6 weakly acidic 7 neutral 8 to 10 weakly alkaline 11 to 14 strongly alkaline The pH meter shows the reading...
Question 1 Report
| pH range | Description |
|---|---|
| 0 to 3 | strongly acidic |
| 4 to 6 | weakly acidic |
| 7 | neutral |
| 8 to 10 | weakly alkaline |
| 11 to 14 | strongly alkaline |
The pH meter shows the reading for a solution. The table gives the pH ranges used to describe solutions. Using the reading and the table, how is this solution best described?
Answer Details
A pH meter gives a numerical reading that you then classify using the descriptive ranges in the table. Values below 7 are acidic, exactly 7 is neutral and values above 7 are alkaline, with the extremes at each end described as strongly rather than weakly.
The meter displays 12.5. That falls inside the band from 11 to 14, which the table labels strongly alkaline, so the solution is best described as strongly alkaline.
Calling it weakly alkaline would need a reading between 8 and 10, and 12.5 is well above that. Choosing either acidic description ignores that the reading is above 7 altogether. A reliable habit is to place the number on the scale first, then read off the description, rather than judging from the word strongly on its own.
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