An analytical chemist monitors a fermentation process. During the active phase, the pH of the growth medium drops from 6.45 to 5.75.
Which of the following correctly describes the change in the concentration of hydrogen ions, [H+][\text{H}^+][H+], in the growth medium?
Increased by a factor of approximately 1.121.121.12
Decreased by a factor of approximately 5.05.05.0
Increased by a factor of approximately 5.05.05.0
Increased by a factor of approximately 0.700.700.70
Practise Edexcel GCSE Chemistry Acids with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.