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Mnenie [13.5K]
3 years ago
6

A sample of potassium nitrate (49.0 g) is dissolved in 101 g of water at 100 °C, with precautions taken to avoid evaporation of

any water. The solution is cooled to 30.0 °C and a small amount of precipitate is observed. This solution is __________.
Chemistry
1 answer:
kvasek [131]3 years ago
8 0

Answer:

Saturated solution

Explanation:

Saturated solution is the solution in which no more solute can be dissolved at a particular temperature.

A amount of the solute, potassium nitrate is dissolved at elevated temperature and on cooling, it precipitates. It means that the solution is saturated at that temperature. <u>Precipitation of the solute at lower temperature indicates that the solution is saturated solution.</u>

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<u>Answers:</u>

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To calculate the number of grams in the number of moles given for each compound, consider the formula:

<em>Moles = No. of grams / molar mass</em>

Therefore, to find the gram it will become:

<em>No. of grams = moles x molar mass</em>

a.  0.410 mol of NaCl (sodium chloride)

Molar mass of NaCl = (286.14 + 35.45) = 321.59

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Molar mass of C2H4 = (12.01 x 2) + (1.01 x 4) = 28.06

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