Posted by **susan** on Sunday, June 8, 2014 at 11:06am.

The pH of a solution changes from 5.5 to 3.5.

This indicates that the [OH−] of the solution

has

1. increased by a factor of 100.

2. increased by a factor of 2.

3. decreased by a factor of 2.

4. decreased by 2 M.

5. decreased by a factor of 100.

6. increased by 2 M.

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