Question

calculate the mass percentage of calcium and phosphorus in calcium phosphate​

Answer 1

Explanation:

45 mgs

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Answer 2

The mass percentage of calcium is 38.71 and phosphorus is 20.

Given:

A compound Calcium Phosphate

To Find:

Mass percentage of calcium and phosphorus in the given compound

Solution:

We can simply solve this problem by using the following mathematical process.

The mass percentage is the mass of elements divided by the molar mass of the compound.

Here, the given compound to us is calcium phosphate and its formula is $Ca_{3} (PO_{4} )_{2}$.

So,

Molar mass of $Ca_{3} (PO_{4} )_{2}$ = (3 × atomic mass of calcium) + (2 × atomic mass of phosphorus) + (8 × atomic mass of oxygen)

We know that atomic mass of calcium = 40, phosphorus = 31 and oxygen = 16.

Therefore, putting the values we get,

Molar mass of $Ca_{3} (PO_{4} )_{2}$ = 120+62+128

310

Therefore, the mass percentage of calcium in calcium phosphate

$\frac{120}{310}$ × 100 = 38.71

Similarly, the mass percentage of phosphorus in calcium phosphate

$\frac{62}{310}$ × 100 = 20

Hence, the mass percentage of calcium is 38.71 and phosphorus is 20.

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