Question

(a) What is the tooth enamel chemically? State the condition when it starts corroding. What happens when

food particles left in mouth start degrading? Why do Doctors suggest use of tooth powder / toothpaste to

prevent tooth decay?

(b) What is water of crystallization? Name and give the formula of two salt containing water of

crystallizati​

Answer 1

Answer:

Explanation:

A) Tooth enamel is chemically calcium phosphate

The enamel starts corroding when the bacteria in our mouth convert the sugar from our mouth into acids which in turn react with Ca3PO4 ( calcium phosphate ).

Doctors suggest use of tooth powder because it neutralizes the effect of acids produced by the bacteria in our mouth .

B) water of crystallization is the number of water molecules held by per molecule of compound . Some compounds exist in crystalline form eg CuSO4.5H2O

Na2C03 10H2Ois hydrated sodium carbonate salt or sodium carbonate with water of crystallisation. Na2C03 is anhydrous sodium carbonate or salt of sodium carbonate (anhydrous) and 10H2O means water of crystallisation