After being thoroughly stirred at 10.°C, which mixture is heterogenous? (1) 25.0 g of KCl and 100. g of H2O (2) 25.0 g of KNO3 and 100. g of H2O (3) 25.0 g of NaCl and 100. g of H2O (4) 25.0 g of NaNO3 and 100. g of H2O

1 Answer
Meave60
Jun 20, 2018

There will be #"5.0 g KNO"_3"# left undissolved.

Explanation:

The solubility plot below shows the solubility of ionic compounds in grams of solute per 100 grams of solvent #("H"_2"O")# at different temperatures. #"25.0 g"# of all of the compounds given in the question, except #"KNO"_3"#, are completely soluble in #"100 g H"_2"O"# at #"10"^@"C"#. At #"10"^@"C"#, only #"20.0 g KNO"_3"# will dissolve in #"100 g"# of water.

http://www.800mainstreet.com/9/0009-004-solub.html

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