The table below gives the solubilities of potassium nitrate at different temperatures.

The table below gives the solubilities of potassium nitrate at different temperatures.


(i) Plot a graph of the solubility of potassium nitrate (vertical axis) against temperature.
(ii) Using the graph:
I. Determine the solubility of potassium nitrate at 15⁰C.
II. Determine the mass of potassium nitrate that remained undissolved given that 80g of potassium nitrate were added to 100cm³ of water and warmed to 40⁰C. (2mks)
(iii) Determine the molar concentration of potassium nitrate at 150⁰C. (Assume there is no change in density of water at this
temperature) (K = 39.0; N = 14.0; O = 16.0)

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(i)

(ii) I. 25g for 100g of water
II. Mass dissolved = 62g
Mass undissolved = 80 - 62 = 18g


(iii)

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maurice.mutuku answered the question on September 12, 2019 at 06:16

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