Question

а) Какова химическая формула для яичной скорлупы, каково б) процентное содержание кальция и в) процентное содержание фосфора?

a) What is the chemical formula for the eggshell, what is b) the percentage of calcium and c) the percentage of phosphorus?

Answer 1

Answer

a. CaCO3 (Calcium Carbonate)

b. Percentage of Ca - 40 % (by weight)

c. Percentage of Phosphorus - 0.3 % (by weight)

Explanation - Egg shell is the,hard, outer covering of an egg. The main component of egg shell is Calcium carbonate (above 95 % ). The egg shell has many minute pores which allows the passage of air and moisture into the egg. In addition to Calcium carbonate, egg shell aso contains minerals such as phosphorus (0.3 % ), magnesium (0.3 %) and traces of sodium, pottasium, iron, manganese, copper etc.