Project #29661 - Small Intro to Chem Solubility Quiz

  1. I will have to private message you the actual powerpoint slides, that have the detail, very small and easy assignment, i know isnt even worth $20 to someone who knows their sciences.

    VERY SHORT/SMALL - Solubility and Concentration Terms Quiz

    A short series of slides introducing several questions.  Please explain the derivation of the solutions submitted.

    Sample Mixture:

     

    90 g KNO3 / 10 g NaCl

    Fractional crystallization:

      The entire sample is dissolved in 100 mL of water at 600C , and the solution cooled to 00C

    Q1  What amount of NaClwill stay in solution at 00C?

    Q2a  What amount of pure KNO3will precipitate from solution at 00C?

    Q2b If the filtrate from the isolation of    the precipitated KNO3 is reduced in volume to 50mL, will further KNO3 precipitate, and if so in what mass, and will it be contaminated with NaCl?

    Q3.  Solute X has solubility of 11.0 g/100g H2O at 20oC, and of 23.0 g/100g

     H2O at 30oC.  If 35.0 g H2O is saturated with X at 20oC, what further quantity of X will dissolve if the temperature is raised to 30oC?

     

    Q4.a  A solute (46.0 g) is dissolved in water (268 g).  Calculate the % concentration by mass of the solution.

     

    Q4.b  Salt (162 g) is dissolved in water to form 3.46 L of solution.  What is the concentration of the solution, m/v?

     

    Q5.a  How may the concentration term 20% m/v be written as a conversion factor?

     

    Q5.b  What mass of glucose is contained in 205 mL of a 5.50% m/v solution?

     

    Q5.c  What volume (mL) of methanol is contained in 2.97 L of an 18.5% v/v solution of methanol in water?

    Q5.d  What volume (mL) of a 6.00% m/v solution of salt in water contains 40.9 g salt?

     

Subject Science
Due By (Pacific Time) 05/02/2014 05:00 pm
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