16) What is the solubility of sodium carbonate (in g/100ml) at 0.0°c? (Use therm

Question

16) What is the solubility of sodium carbonate (in g/100ml) at 0.0°c? (Use thermo info on the last p (Hint: ICE table] a. 0.234 g/100ml b. 7.77 g/100ml c. 24.23g/100ml d. 1.12x10t g/100ml solution has a freezing point of-234°C, if the unknown solution is an alka and has a concentration of (0.1044g salt)/g H,0), what is the molecular weight of the salt? (lect question) [for water kf = 1.86 /m) a. 86.2 g/mol b. 234.3 g/mol c. 58.4 g/mol d. 165.9 g/mol 18) Predict how the given reaction with given initial conditions will proceed @1000°C Fe0(s) + COg) Fe(s) + CO2(g) K.-0.403 14mol 0.03mol 1.4mol .007mol in 100ml a. It will proceed to products b. It is at equilibrium c. It will proceed to reactants d. Not enough information is provided

Explanation / Answer

Ans 16 : b) 7.77 g/100mL

Sodium carbonate is Na2CO3. Its solubilty in 100 mL water is 7.77 g at 0oC . The solubility increases with increase in temperature , so it becomes 12.5 g/100 mL at 10oC .

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