Suppose a saturated aqueous solution of sodium nitrate is prepared. Which of the

Question

Suppose a saturated aqueous solution of sodium nitrate is prepared. Which of the following statements is FALSE about this solution? In the solution, sodium ions are surrounded by the negative dipoles of water molecules. In the solution, nitrate ions are surrounded by the positive dipoles of water molecules. If more solid sodium nitrate is added to this solution, the temperature would go down. If more solid sodium nitrate is added to this solution, it would not dissolve, and just sink to the bottom. If the temperature of the solution is raised, more sodium nitrate would dissolve. Rank the following substances in order of solubility in water, and explain your reasoning.

Explanation / Answer

All statements are true

a) Positive Na+ ions dissolve when attracted by negative part of dipole of water molecule(polar molecule) while nitrate ions(NO3-) are negative so solvated by positive dipole of water molecule

c)the sovation of sodium nitrate in water is endothermic so temperature decreases

d) saturated solution do not dissolve anymore salt as no space is left over

e) solubility of salt increases with increase in temperature

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