Question

g of sodium nitrate (NaNO,) dissolves in 100 g of water at 20°C. Is this solution saturated or unsaturated? Wha t would happen if you added ten more grams of sodium nitrate to the solution? What would if you added the ten grams and raised the temperature to 40 C? lution is unsaturated. Adding ten additional grams of solute (NaNO,) would result in a homo geneous solution. Raising the temperature of the solution by 20°C would not affect the solution ning the ten additional grams of solute other than enabling the solution to carry additional grams of solute According to Figure 14.1, about 88 g of NaNO, is soluble in 100 g of water at 20°C. Since 88 g is equal be saturated. Adding ten grams of solute (NaNO,) would result in the excess solute sinking to the bottom to the maximum amount of solute that can dissolve in 100 g of solvent, the solution prepared above would of the container undissolved. According to Figure 14.1, about 105 g of NaNO, is soluble in 100 g of water at 40°C. Since 98 g of NaNO, is less then 105 g, the maximum amount of solute that can dissolve in 100 g solvent, all the NaNO, would dissolve and the solution would be unsaturated. According to Figure 14.1, about 88 g of NaNO, is soluble in 100 g of water at 20°C. Since 88 g is equal to the maximum amount of solute that can dissolve in 100 g of solvent but not greater the solution prepared above would be unsaturated. Adding ten grams of solute (NaNO,) would result in the excess solute being added so the excess solute would sink to the bottom of the container undissolved resulting in a saturated solution. According to Figure 14.1, about 105 g of NaNO, is soluble in 100 g of water at 40°C. Since 98 g of NaNO, is less then 105 g, the maximum amount of solute that can dissolve in 100 g solvent, all the NaNO, would dissolve and the solution would be unsaturated This solution is saturated. Adding 10 g of solute to the already saturated solution would make the solution supersaturated. Increasing the temperature to 40°C would result in some of the solid solute dissolving. However, some of the solid solute would remain on the bottom of the container in which it was prepared d. Give an example of a strong electrolyte. What property would make it a strong electrolyte? An example of a strong electrolyte is sodium chloride, NaCI. This molecule remains intact in an aqueous solution. Because it remains a large molecule, its movement in the solution conducts a greater electric current. An example of a strong electrolyte is sodium chloride, NaCI, an ionic salt. When an ionic salt, NaCl, solves in water, the individual ions separate, dissociate almost completely, into positively and negatively charged ions, Na" and Cl. These ions are mobile and can move from one part of a solution to another. This movement of charged ions allows the transport of electricity f the solution can rom one spot to a so conduct electricity. Because strong electrolytes dissociate almost completely in an aqueous solution, an increased number of positively and negatively charged ions are produced allowing for more electricity to be conducted so they are good conductors of electricity mple of a strong electrolyte is sulfuric acid, H,SO.. The presence of two hydrogen ions in an solution is what makes it a strong electrolyte aqueous An example of a strong electrolyte is sodium hydroxide, NaOH. When NaOH dissolves in water, the individual ions separate, dissociate almost completely, into three positively and negatively charged ions Na',0* and H'. These ions are mobile and can move from one part of a solution to another. This movement of charged ions allows the transport of electricity from one spot to another so the solution can conduct electricity. Because strong electrolytes dissociate almost completely in an aqueous solution, an increased number of positively and negatively charged ions are produced allowing for more electricity to be conducted so they are good conductors of electricity

Answer 1

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