Question

b. RELAB: Name: e at the beginning of lab. Write your answers in the space provided. Ise the solubility curve to help you answer the following questions: 1. Why does the x axis of the graph only go from 0°C to 100°C? 2. Which substance is most soluble at 10°C? NaNO3 Grams of solute per 100 g H,0 KNOG 3. Which two substances share the same solubility at 80°C? Naci, K103 4. Which substance's solubility changes the most drastically? KNO3 Which substance experiences the least amount of change in its solubility? Nad 5. How many grams of sodium nitrate can be dissolved in 175mL of water to make a saturated solution at 30°C? KCIO +Ce2(SO4)31 5 10 20 30 40 50 60 70 80 90 100 Temperature (°C) 6. What is the solubility of potassium chloride at 90°C? 530 7. At what temperature does sodium nitrate have a solubility of 115 g/100mL? 50°C 8. You have a solution of potassium chlorate containing 30 grams at 80°C. Is the solution saturated, unsaturated, or supersaturated? unsaturated 9. The solution described above in #8 is allowed to cool. At what temperature would crystals appear? 10. A solution of ammonium chloride contains 52g/100mL at 80°C. How many additional grams of ammonium chloride can be dissolved to create a saturated solution?

Answer 1

Following is the - the complete Answer -&- Explanation: for the first four questions ( i.e. Question - 1 to Question - 4) , of the given:  Question Set..in.....typed format...

$\Rightarrow$Answer(s):

1. question - 1:  The x- axis: goes from 0 ^oC to  100.0 ^oC. because, it is an aqueous solution.
2. question - 2:  Potassium Iodide ( KI ), is most soluble substance at 10.0 ^oC...
3. question - 3:  NaCl and KClO₃  : have the same solubility, at 80.0 ^oC...
4. question - 4:  The solubility of KNO₃, changes most drastically, with increasing temperature. And, NaCl, shows the least amount of change in solubility: with increasing temperature.

$\Rightarrow$Explanation:

Following is the complete: Explanation: for the above: Answers...

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$\Rightarrow$Question - 1:

Since, we have the solvent: as water: and the given graph: along the y - axis: shows the aqueous solubility of different compounds, the : range of temperatures: along the x -axis: range from : 0.0 ^oC  ( i.e. the melting point of water ), and 100.0 ^oC ( i.e. the boiling point of water ), i.e. the range of temperature, within which, a compound , can get and remain dissolved in liquid water. Therefore: the above is the reason: for which: the x-axis: of the graph: shows, temperatures: from 0.0 ^oC to 100.0 ^oC, only !

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$\Rightarrow$Question - 2:

As we can see, from the graph: at 10.0 ^oC , potassium iodide ( KI ) , shows the solubility of about: 138 g solute / 100 g of H₂O  , ( i.e. approximately: 138 grams of potassium iodide, remains dissolved in about 100 grams of solvent, i.e. water , at 10.0 ^oC ). The above is the reason: our answer: would be: KI , which has the maximum solubility, at 10.0 ^oC, among the other given compounds.

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$\Rightarrow$Question - 3:

As we can see, from the given: graph: at  80.0 ^oC, both : NaCl, and KClO₃, show the same solubility of : approximately: 40.0 g solute / 100 g of solvent ( i.e. H₂O ) ...

Thus, our answer: will be: NaCl and KClO₃.... which two compounds share approximately, the same solubility: at 80.0 ^oC..

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$\Rightarrow$Question - 4:

As we can see, from the given: graph: the slope of the increasing solubility : of  KNO₃is the highest, and as we can see, the solubility: of NaCl, doesn't change significantly, with increasing temperature... Therefore: our answers : will be: KNO₃, and NaCl , respectively...

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