A saturated sodium carbonate solution 100 degrees celsius contains 45.5 g of dis

Question

A saturated sodium carbonate solution 100 degrees celsius contains 45.5 g of dissolved sodium carbonate per 100. mL of solution. The solubility product for sodium carbonate at this temp is
Possible answers 79.0 0.316 0.0790 36.8 316. A saturated sodium carbonate solution 100 degrees celsius contains 45.5 g of dissolved sodium carbonate per 100. mL of solution. The solubility product for sodium carbonate at this temp is
Possible answers 79.0 0.316 0.0790 36.8 316.
Possible answers 79.0 0.316 0.0790 36.8 316.

Explanation / Answer

moles of Na2CO3 dissolved = mass/molecular weight

= 45.5 g/ 105.99 g/mol= 0.429

concentration of Na2CO3 = moles/volume

= 0.429/ 0.100 L= 4.29 M
Na2CO3 = 2Na+ + CO3 -2
[Na+]= 4.29 x 2 =8.58 M
[CO32-] = 4.29 M

Ksp = [Na+]^2[CO32-] = (8.58)^2 x 4.29 = 316

OPTION E IS CORRECT

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