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Ways of Representing the Concentration of a Solution

The formula u...

Question

The formula unit mass of ${C a F}_{2}$ is 78 u.

A

True

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B

False

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Solution

The correct option is A True

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Q. (a) Define 'formula unit' of an ionic compound. What is the formula unit of (i) sodium chloride, and (ii) magnesium chloride ?
(b) Calculate he formula masses of the following compounds :
(i) Calcium chloride
(ii) Sodium carbonate
(Given : Atomic masses : Ca = 40 u ; Cl = 35.5 u ; Na = 23 u ; C = 12 u ; O = 16 u)

310 K

, the solubility of

C a F_{2}

2.34 \times 10^{- 3} g / 100 m L

. The solubility product of

C a F_{2}

\times 10^{- 8} {(m o l / L)}^{3}

(Given molar mass:

C a F_{2} = 78 g m o l^{- 1}

)

Q. The formula unit mass of

{M g C l}_{2}

Q. The formula unit mass of

N a_{2} O

Q. Calculate the formula unit mass (u) of

{C a C l}_{2}

[ Ca = 40 u, Cl = 35.5 u]

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Ways of Representing the Concentration of a Solution

Standard IX Chemistry

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