Answer: 100 times
Explanation:
The pH of the lemon juice 2 and the pH of the tomato juice is 4. The pH scale represents the change in the concentration by a factor of 10.
The lemon juice has a pH of 2 and tomatojuice has a pH of 4 so the difference is 10 *10 =100.
The concentration change will be 100 times. On the pH scale the lemon juice is 100 times more acidic as compared to that of the tomato juice.
