Ph00 1 crape myrtle

(0) The pH value of soap is greater than 7, which is alkaline and can turn colorless phenolphthalein test solution into red.

(2) The pH value of tomato is less than 7, which is acidic and can turn purple litmus test solution into red.

(0) The pH value of plant ash is higher than that of toothpaste, and it is more alkaline. So, fill in: strong.

(6) The pH value of tomato is higher than that of vinegar, and its acidity is weaker.