Hi, my question is:
"Classify each of the following as saturated, supersaturated, or unsaturated:

KNO3 90g/100g at 82*C
NaCl 36g/100g at 23*C
KCl 35g/100g at 18*C
NaNO3 90g/100g at 28*C

How do I determine if they are saturated, supersaturated, or unsaturated?

Since the question is so specific regarding temperature, you must have some data you have collected or that is a part of your work (such as an experiment). You don't mention the solvent? Is it water? And is the solvent the grams of solvent or grams of solution? For example, should the first one read 90 g KNO3 in 100 g water or 90 g KNO3 in 100g of solution? Look in your reference for the solubility of KNO3, for example. I have a reference at home that gives an approximate solubility of 36 g KNO3 in 100 mL water @ 25 degrees C, The value at 82 degrees C will be different but we would say the solution was supersaturated if the question was for 25 degrees C.
As an example, and using the solubility at 25 degrees C as 36 g KNO3/100 mL, a soln would be classified as follows:
1 g/100 mL would be unsaturated becasue it COULD dissolve more.

36 g/100 mL would be saturated since that is the limit of its solubility. Another crystal added to that solution would simply float to the bottom of the flask and not dissolve.

If by some hook or crook we dissolved 50 g KNO3/100 mL water at 25 degrees C., we would call it supersaturated because the solvent has dissolved MORE THAN what is required for a saturated solution; thus the name supersaturated. (You may wonder how one does that. For some salts we could raise the temperature to near boiling, dissolve more than would be required for a saturated solution at 25 C., then let the solution cool slowly and without agitation. Some salts will not precipitate the excess amount of salt; thus we have a supersaturated solution. I hope this helps.

  1. 👍 0
  2. 👎 0
  3. 👁 933
asked by Waleed

Respond to this Question

First Name

Your Response

Similar Questions

  1. chem

    A solution contains 32 g of KNO3 per 100g of water at 25 degree C. Is the solution unsaturated, saturated, or supersaturated? I think its saturated Look at your saturation chart. I will be happy to critique your thinking. is there

    asked by jake on April 5, 2007
  2. science

    . If you dissolve 70.0g of KNO3 at a temperature of 60.0°C, would the resulting solution be unsaturated, saturated, or supersaturated?

    asked by joulie on July 17, 2015
  3. chemistry

    If 20 g KCl is dissolved in 100g of water at 20 degrees C, is the solution unsaturated, saturated, or supersaturated?

    asked by bob on May 20, 2009
  4. chem

    If 20 g KCL is dissolved in 100g of water at 20 degrees C, is the solution unsaturated, saturated, or supersaturated?

    asked by tom on May 28, 2009
  5. chemistry

    If 20 g KCL is dissolved in 100g of water at 20 degrees C, is the solution unsaturated, saturated, or supersaturated?

    asked by kate on May 29, 2009
  6. chem

    is a solution containing 35g of NaCl per 100g of water at 25 degrees Celsius, saturated, unsaturated, or supersaturated

    asked by nakisha on March 1, 2012
  7. Chemistry

    The solubility of KCLO3 at 25 degree celcius is 10.9 per 100.g of h20. question: If 15 g are addded to 100 g of water at 25 degree celcius with stirring, how much of KCLO3 will dissolve? Is the solution saturated, unsaturated, or

    asked by Tammy on May 7, 2007

    How can we prepare or change : 1) change unsaturated to saturated soln? 2) change unsaturated to supersaturated? 3) change saturated to unsaturated ? 4) change saturated to supersaturated ? 5) change supersaturated to unsaturated?

    asked by MAD on September 24, 2014
  9. Chemistry-Help Please!

    @ 20 Celsius - 22g CuSO4 / 100g H2O @ 40 Celsius- 42g CuSO4 / 100g H2O Using this, answer whether these are saturated or unsaturated @ 40 Celsius is 5g CuSO4 / 10g H2O @ 40 Celsius is 99g CuSO4 / 250g H2) I was told that the first

    asked by Julie on May 19, 2011
  10. Chemistry

    A solution is prepared by dissolving 3.0 × 10-4 mol of AgNO3 and 3.0 × 10-5 mol of K2CrO4 in 1.00 liter of solution. With respect to Ag2CrO4 (Ksp = 1.9 × 10-12), is the resulting solution saturated, supersaturated, or

    asked by Anonymous on November 18, 2015

More Similar Questions