Last modified: Fri 09/23/2016 10:45:58 am
BCE

Oklahoma State University

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Answer all of the questions below. If you do not know an answer enter CNA. However, it will help me the most if you answer each question with your best intuition/idea about what would be a reasonable answer.


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Solution formation: Adding a solid to water.

Watch the movie to see how to prepare 250 mL of a solution that is 1 molar CuSO4 (1 M).

Molarity is defined as the number of moles of a compound per liter of solution.

So a 1 molar solution contains 1 mol of a compound in 1 liter of solution. If we only have 250 mL of a 1 molar solution, then there would be 0.250 mol of the compound in 0.250 L of solution. Note: 0.250 mol/0.250 L = 1 molar

See some additional solutions prepared.

1. After watching the movie above, how would you prepare 250 mLs of a 0.500 M NaCl solution. (NOTE: you must determine the mass of NaCl that must be added to water and then explain the proper way to prepare the solution.)

2. How many moles of NaCl are contained in 100. mLs of a 0.500 M solution? moles

3. How many moles of AgNO3 are required to react with the moles of NaCl determined in Q2? (Assume the reaction is,

AgNO3(aq) + NaCl(aq) ---> AgCl(s) + NaNO3(aq)

moles of AgNO3

4. How many milliliters of 0.450 M AgNO3 is needed to completely react with the NaCl in 100. mLs of 0.500 M NaCl?

mLs

5. Is there anything about the questions that you feel you do not understand? List your concerns/questions.

6. If there is one question you would like to have answered in lecture, what would that question be?