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Nucleophilic Substitution Reaction

10g of a samp...

Question

10g of a sample of a mixture of CaCl2 and NaCl is treated to precipitate all the Ca as CaCO3. This CaCO3 is heated to convert all the Ca to CaO and the final mass of CaO is 1.62g. The percent by mass of CaCl2 in the original mixture is.

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10

g of a sample of a mixture of

C a C l_{2}

N a C l

is treated to precipitate all the calcium as

C a C O_{3}

C a C O_{3}

is heated to convert all the

C a

C a O

and the final mass of

C a O

1.62

g. The percent by mass of

C a C l_{2}

in the original mixture is :

10.0

g sample of a mixture of

C a C l_{2}

N a C l

is treated to precipitate all the calcium as calcium carbonate. This

C a C O_{3}

is heated to convert all the

C a

C a O

and the final mass of

C a O

1.62

X

percentage by mass of

C a C l_{2}

is in the original mixture, then value of

10 X

Q. A sample of mixture of

C a C l_{2}

N a C l

5.55

g was treated to precipitate all the

C a

C a C O_{3}

which was then heated and quantitatively converted to

1.68

C a O

. The mass percentage of

C a C l_{2}

in the mixture is;

Q. A Sample of mixture of

C a C l_{2}

N a C l

4.44 g

was treated to precipitate all the

C a

C a C O_{3}

, which was then heated and quantitatively converted to

1.12 g

C a O

. (Atomic weight: Ca= 40, Na= 23, Cl= 35.5)

Q. A sample of a mixture of

C a C l_{2}

N a_{2} C O_{3}

4.22

g was treated to precipitate all the

C a

C a C O_{3}

C a C O_{3}

is heated and quantitatively converted into

0.959

C a O

. Calculate the percentage of

C a C l_{2}

in the mixture.

(Atomic mass of

C a = 40, O = 16, C = 12

C l = 35.5 g / m o l e)

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