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6.8: Unit 6 Practice Problems

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    Question 1. 

    In a solution, the substance being dissolved is called the _____________.

    Answer

    solute

    In a solution, the substance that does the dissolving is called the _____________.

    Answer

    solvent

    Question 2. 

    If 3.0g of Na2SO4 is dissolved in 450mL of water.  What is the concentration of the resulting solution in g/L, g/dL, % w/v, mg/dL, mg%, M and mM.  

    Answer

    clipboard_e22d63a2ec18f50ac6412e8cadbe5014b.png

    Question 3. 

    What is the % by volume concentration of a solution of acid which contains 56mL HCl dissolved in 0.70L of distilled water? 

    Answer

    clipboard_e918703e1ead8b51e960025619c87019a.png

    Question 4. 

    A patient needs to be injected with 5.0mg of a drug.  The drug is in a solution with a concentration of 2.0mg/mL.  How many mL of this medication should be given to the patient?  

    Answer

    clipboard_efc1a1e1017f413950efba0bb5888e844.png

    Question 5.

    If you have 41 mL of 0.36M KCl and you add 150mL of distilled water to the solution, what is the concentration in mM of the diluted KCl solution?

    Answer

    clipboard_e3618ccffad5eb86709d5d1c88fbdcf9c.png

    Question 6.

    If 86 mL of 5.0% w/v NaCl solution is diluted to 1.1L what is the concentration of the resulting solution in %w/v and mg/dL?

    Answer

    clipboard_ee60f054f9bc2aae82e5ab03f202fd745.png

    Question 7.

    How many mL of a 8.0g/dL NaOH solution would be needed to provide a total of 36g of NaOH.  

    Answer

    clipboard_ebc60e66fe59f77a93f56800d5a41ffe5.png

     

    Question 8. 

    Predict whether N2 will be more soluble in water (a polar substance) or gasoline (a nonpolar substance). 

    Answer

    N2 will be more soluble in gasoline because N2 is also nonpolar (like dissolves like)

     If ascorbic acid is soluble in water, would you expect it to be soluble in fat (a nonpolar substance)?

    Answer

    Since ascorbic acid is soluble in water, it is reasonable to assume that it is polar (or ionic) making it insoluble in fat.  

    Question 9. 

    What is the concentration in ppm if 0.0130 grams MgCl2 is dissolved in 1.20L of water?

    Answer

    clipboard_ea6b27f7c4addd204b1ca81a06790d602.png

     

    6.8: Unit 6 Practice Problems is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts.