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Preparation and Properties and Uses of Potassium Hydroxide

25 g of Na2CO...

Question

25 g of Na2CO3 is dissolved in enough water to make 250 ml solution . if Na2CO3 dissociates completely molar concentration of Na+ and CO3 2- carbonate ions are ?

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Solution

No of moles of Na+ = 2Ã— no of mole of Na2CO3 and no of moles of CO3-2= no of mole of Na2CO3. Here no of moles of Na2CO3 is 25/106. So molarity of Na+= 2Ã— (25/106)Ã—1000/250= 200/106= 100/53. Similarly molarity of CO3-2= (25/106)Ã—1000/250= 100/106= 50/53.

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25.3 g

of sodium carbonate,

N a_{2} C O_{3}

is dissolved in enough water to make

250 m L

of solution. If Sodium carbonate dissociates completely, molar concentration of sodium ion,

N a^{+}

and carbonate ions,

C O_{3}^{2 -}

are respectively

(molar mass of N a_{2} C O_{3} = 106 g m o l^{- 1})

Q. 25.3 g of sodium carbonate

N a_{2} C O_{3}

is dissolved in enough water to make 250 mL of solution .If sodium carbonate dissociates completely molar concentration of sodium ions

N a^{+}

and carbonate ions are respectively (molar mass of

N a_{2} C O_{3} = 106 g m o l^{- 1}

25.3

g of sodium carbonate,

N a_{2} C O_{3}

is dissolved in enough water to make

250

mL of solution. If sodium carbonate dissociates completely, molar concentration of sodium ion,

N a^{+}

and carbonate ions,

C O_{3}^{2 -}

are: (Molar mass of

N a_{2} C O_{3} = 106

m o l^{- 1}

)

Q. 25.3 g of sodium carbonate is dissolved in enough water to make 250 ml of solution. If sodium carbonate dissociates completely, then what is the molar concentration of sodium ions and carbonate ions?

Q. 25.3 g of sodium carbonate, Na

_{2}

_{3}

is dissolved in enough water to make 250 mL of solution. If sodium carbonate dissociates completely, the molar concentration of sodium ion, Na

^{+}

and carbonation,

C O {_{3}}^{2 -}

are respectively:
[Molar mass of Na

_{2}

_{3}

^{- 1}

]

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