Units Worksheet

 

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  1. Units to describe a solution

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  2. What are the units of molarity?

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  3. What are the units of molality?

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  4. How do you determine the mole fraction?

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  5. How do you determine the mass percent?

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  6. Calculate the molar concentration of all the ions in the following strong electrolytes.

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    1. 75g of KCl dissolved in 250 mL of water.

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    2. 100.0g of MgF2 dissolved in 500.0 mL of water

     

     

  7. An aqueous antifreeze solution is 40.0% ethylene glycol (C2H6O2) by mass.  The density of the solution is 1.05 g/cm3.  Calculate the molality, molarity, and mole fraction of ethylene glycol.

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  8. What is a dilution?

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  9. What equation is useful in a dilution?

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  10. How much water must be added to a 2.00M stock sol’n of NaOH to make 100.0 mL of a 0.100M NaOH sol’n?

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