Question

25.3 g of sodium carbonate, Na2CO3 is dissolved in enough water to make 250 mL of solution. If sodium carbonate dissociates completely, molar concentration of sodium ion, Na+ and carbonate ions,CO2−3 are respectively (Molar mass of Na2CO3 = 106 g mol–1)

Answer 1

Answer:

approx. 1.912 M & 0.956

Explanation:

No. of moles of Na2Co3 = 25.3 / 106 = 0.239 moles.

No. of moles of solution = 0.239 / 0.25 = 0.956 mol/litre.

Na2Co3 ------> 2Na+ + Co3^2-

Rest steps are in the image

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