Question

What is common in all the water soluble bases (or alkalis)?
Why does tooth decay start when the pH of mouth is lower than 5.5 ?
What is the pH of a neutral solution ?​

Answer 1

Answer:

Bacteria in the mouth create acids after eating through the oxidation of sugar and food particles in the mouth. Tooth decay starts when the mouth's pH is below 5.5. In addition to food particles, masses of bacterial cells bind to the teeth to form dental plaque.

Explanation:

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Answer 2

Answer:

hydroxide ions

water p.h neutral