For each salt, determine how much will remain undissolved if 500 g is mixed into a liter of pure water at 40 °c. one significant figure is sufficient in each answer

Question

Physics

Magdalena Warren

28 September, 07:37

For each salt, determine how much will remain undissolved if 500 g is mixed into a liter of pure water at 40 °c. one significant figure is sufficient in each answer

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Answers (1)

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Katelyn Fowler · Answer 1

The question includes a solubility diagram for Pb (NO3) 2, K2Cr2O7, and KCl, at temperatures from 0 to 100 °C.

The solubility is expressed in g/L.

When you read the solubilities at 40°C, you get:

Pb (NO3) 2: 750 g/L

KCl: 400 g/L

K2Cr2O7: 200 °g/L.

The answer is asked with one significant figure because the divisions of the solubility reflect 100 g/L.

Now calculate how of each sald would be dissolved and how much would remain undissolved.

Pb (NO3) 2: Solubility = 750 g/L = > all 500 g will be dissolved, so 0 g will remain undissolved

KCl: solubility = 400 g/L = > 400 g will be dissolved, so 100 g will remain undissolved.

K2Cr2O7: solubility = 200 g/L.=> 200 g will be dissolved, so 300 g will remain undissolved.