# Question #1f4d1

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#### Explanation:

You can solve this problem by looking at the **solubility graph** for potassium nitrate,

For starters, the temperature is given to you in *Kelvin*, so convert it to *degrees Celsius*

#t[""^@"C"] = "313 K" - "273.15 K" ~~ 40^@"C"#

Now, according to the solubility graph, potassium nitrate has a solubility of about **saturated solution** of potassium nitrate at

In other words, an aqueous solution of potassium nitrate will contain a maximum of **dissolved** potassium nitrate for every

You can now use this solubility to figure out how many grams of potassium nitrate can be dissolved in **saturated solution**

#50 color(red)(cancel(color(black)("g H"_2"O"))) * "67 g KNO"_3/(100color(red)(cancel(color(black)("g H"_2"O")))) = "34 g KNO"_3#

I'll leave the answer rounded to two **sig figs**.