Sorry I have one other question that i'm unsure about. for the solution process of A (s)----> A (aq) the teacher demonstrates upon mixing A in H2O that the temp falls from 22 to 5 degrees C. The soluability of this solid is known to be 28g/100g H2O at 30 degrees C. If the solvent (water) temp is increased from 30 degrees C to 60 degrees C, we would expect the soluability of A to:

a. decrease by 1/2
b. increase by 2X
c. not change
d.increase but we cannot determine the value w/o more info
e.decrease but we cannot determine the value w/o more info

i'm not sure how to solve this. any help is much appreciated

  1. 👍
  2. 👎
  3. 👁
  1. You can answer this with Le Chatelier's Principle. Let me write what happens in chemical form instead of words.
    A(s) + H2O ==> A(aq) + cold OR
    A(s) + H2O ==> A(aq) - heat. Isn't that what happens? I think so but check me out. Then we can rewrite this in more standard form as
    A(s) + H2O + heat ==> A(aq).
    Now, as we add heat, what happens to the reaction? It is shifted toward the right because heat drives it to the right. LeChatlier's Principle states that a system in equilibrium subjected to a stress will react in such a way so as to relieve the stress. Therefore, the system will move so as to remove heat and that means moving to the right because that uses up heat. That eliminates answers a, c, and e and leaves us ONLY with answers b and d. I would pick d because we don't have solubility data for more then the one temperature. I hope this helps but if you don't understand something about it, please repost but give exact details about what you don't understand.

    1. 👍
    2. 👎
  2. this helped so much! thank you, i understand now.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    A solution prepared by dissolving 25.8 mg of benzene (78.11 g/mol) in hexane (86.16 g/mol) and diluting to 250 mL had an absorption peak at 256 nm and an absorbance of 0.266 in a 1.000-cm cell. Question: What is the concentration

  2. Calculus

    Find the area of the region bounded by the curves y = x^(-1/2), y = x^(–2), y = 1, and y = 3. a) (1/2)(3)^1/2 + (4/3) b) 2*(3)^1/2 - (8/3) c) (1/2)(3)^1/2 - (32/3) d) 2*(3)^1/2 - (32/3) e) (8/3) - 2*(3)^1/2 So one thing that is

  3. us history

    The idea of "conversion" is best explained as which of the following? A. the process of cultural change brought about by immigration B. the process of changing the frontier into settled communities C. the process of spreading

  4. chemistry

    the question reads: a) balance the equation: H3PO4 + Ca(OH)2 --> Ca3(PO4)2 + H2O b)what mass of each product results if 750 mL of 6.00 M H3PO4 reacts according to the equation? i balanced it with: 2H3PO4 + 3Ca(OH)2 --> Ca3(PO4)2 +

  1. Chemistry

    What is the molarity of an HNO3 solution if 24.1mL of a 0.250M Ba(OH)2 solution is needed to titrate a 15.0mL sample of the acid? Can you tell me the process to finding this answer?

  2. chemistry

    Consider a solution made by mixing 500.0 mL of 0.04182 M Na2HAsO4 with 500.0 mL of 0.03645 M NaOH. Complete the mass balance expressions below for Na and arsenate species in the final solution. There are 4 arsenate species, but I

  3. math

    given the points A(0,0), B(3,1) and C (1,4) what is the measure of angle ABC I plotted it on a gragh and got 1.46 degress. I am unsure if I am doing this question correctly. Or am I misreading it thanks in advance .

  4. Chemistry

    A calorimeter contains 30.0 mL of water at 11.0 degrees C. When 1.50 g of X (a substance with a molar mass of 65.0 g/mol) is added, it dissolves via the reaction: X (s)+H2O (l) ---> X (aq) and the temperature of the solution

  1. Statistics

    About 7% of men in the U.S. have some form of red-green color-blindness. Suppose we randomly select one U.S. adult male at a time until we find one who is red-green color-blind. How many men would we expect to choose, on average?

  2. English

    I have an essay to write based on this question, but I'm unsure of exactly what it wants me to analyze/write about: More than one hundred years ago, a writer for the Atlantic Monthly confronted an issue that is still timely. Read

  3. Chemistry

    the density of a certain aqueous solution is 1.17g/ml, and the solution is 3.57% by mass NaOH. how many ml of this solution would you need to use in order to prepare 100.0 ml of .150 M NaOH solution? I'm not sure where to start

  4. Chemistry

    HOBr (aq) H+ (aq) + OBr- (aq), Ka = 2.3 x 10^-9 Hypobromous acid, HOBr, is a weak acid that dissociates in water, as represented by the equation. (a) Calculate the value of [H+] in a solution of HOBr that has a pH of 4.95. Ans:

You can view more similar questions or ask a new question.