How do I make a %CO2 solution with Na2CO3 based on its stoichiometric relation and solubility?

Hi, I have a doubt about making an equivalent %co2 solution with sodium carbonate. I have attached the reference equation quoted in the research article. If anyone knows how to derive the equation kindly help me. How do they arrive at 1.3g/L for 5% Co2 and help me to find out for 50% co2 ***reference*** pH=6.30+log [ HCO3− ] −log [ CO2] pH=10.09+log [ CO3 2- ] −log [ HCO3-] The values of sodium carbonate concentrations corresponding to 5%, 10%, 15%, 20% and 30% CO2 concentrations at pH 7 are 1.3 g/L, 2.6 g/L, 3.8 g/L, 5.1 g/L, and 7.6 g/L, respectively. ****reference***

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2022-12-06 06:10:07

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Q: How do I make a %CO2 solution with Na2CO3 based on its stoichiometric relation and solubility?
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The solubility of sodium carbonate in water at 20 0C is approx. 22 g Na2CO3/100 g water.

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How do you prepare 250ml 15m solution of naco3 in a volumetric flask do presume a solvent ie h20 but then you have to presume volumes and conc and because 15M wanted you cant use the flask to dilute?

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