If 15 g of kclo3 are stirred into 200 g of water at 25 c, how much of the kclo3 will dissolve? is the solution saturated, unsaturated, or supersaturated?

Explanation:

∵ The solubility of KClO₃ in water is 8.15 g / 100.0 g of water at 25°C.

∴ The solubility of KClO₃ in water is 16.3 g / 200.0 g of water.

when 15 g of KClO₃ are stirred into 200 g of water at 25°C: the added amount is less than that is soluble in water, so all 15.0 g of KClO₃ will dissolve completely in water.

And this is unsaturated solution, since the added amount is less than the solubility in water.

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hope this !

- melanie

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%