Q.2.20 P Fluorite, a mineral of calcium, ... [FREE SOLUTION]

Chapter 2: Q.2.20 P (page 82)

Fluorite, a mineral of calcium, is a compound of the metal with fluorine. Analysis shows that a 2.76-g sample of fluorite contains 1.42 g of calcium. Calculate the (a) mass of fluorine in the sample; (b) mass fractions of calcium and fluorine in fluorite; (c) mass percents of calcium and fluorine in fluorite.

Short Answer

Expert verified

Mass of fluorine in the fluorite sample = 1.34 g
Mass fraction of calcium = 0.515 and of fluorine = 0.485
Mass percent of calcium = 51.5% and mass percent of fluorine = 48.5%

Step by step solution

Mass of fluorine in Fluorite

Fluorite is a mineral of Ca and fluorine with the formula CaF₂. As it contains only calcium and fluorine. Hence, the mass of fluorine can be calculated as:

$M a s s o f F l u o r i n e = M a s s o f f l u o r i t e - M a s s o f C a l c i u m = 2.76 g - 1.42 g = 1.34 g$

Mass Fractions

The formula for mass fraction:

$M a s s f r a c t i o n = \frac{M a s s o f c o m p o n e n t}{T o t a l M a s s}$

Mass fraction of calcium and fluorine can be calculated as,

$M a s s f r a c t i o n o f C a l c i u m = \frac{1.42}{2.76} = 0.515$

$m a s s f r a c t i o n o f f l u o r i n e = \frac{1.34}{2.76} = 0.485$

Mass Percent Calculation

The formula for mass percent is given as

$M a s s p e r c e n t = \frac{M a s s o f c o m p o n e n t}{T o t a l M a s s} 脳 100$

The mass percent of calcium and fluorine can be calculated as,

$m a s s p e r c e n t o f C a l c i u m = \frac{1.42}{2.76} 脳 100 = 51.5 %$

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Short Answer

Step by step solution

Mass of fluorine in Fluorite

Mass Fractions

Mass Percent Calculation

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