Question

-1.
Why does the tooth decay starts when pH of the mouth is lower than 5.5
2.
What is the role of toothpaste in preventing cavities?
Why solution of HCL in water conducts electricity but that of glucose in
water does not, though both contain laydrogen?
moke food tasty and crispy.​

Answer 1

Answer:

1.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. ... Since plaque coats the teeth, saliva can not reach the tooth layer to neutralize the acid.

2.To prevent the tooth from getting affected with cavities, toothpastes are used. Toothpaste is a chemical combination of bases. When acid and base interact with each other neutralization occurs. Thus the role of toothpaste in protecting the teeth from cavities is to reduce the acidic attack by neutralization process

Because in order for a solution to conduct electricity, it must be an electrolyte - that is, it must contain free ions (charged particles). HCl, or hydrochloric acid, dissolves freely in water, with its ionic bonds releasing to create H+ and Cl- ions in solution. ... Glucose is not an ionic substance.

Answer 2

Explanation:

1.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. Since plaque coats the teeth, saliva can not reach the tooth layer to neutralize the acid.

2.luoride works by making the enamel more resistant to acids produced by the bacteria living on the teeth and gums. Hence, toothpaste containing fluoride is used to prevent cavities.

HCl is ionic in nature and can easily split into its ions when dissolved in water and conducts electyricity while glucose is covalent in nature and canot split into its ions when dissolved in water.

HOPE THIS MAY HELP YOU!