Name ________________________
     Chemistry 101      Lab Quiz #3     11/16/98

An uncalibrated therometer was placed in ice water and the position of the mercury marked.  The
thermometer was then placed just above boiling water and the mercury marked.  There was a distance of
120 mm between the freezing point and the boiling point of water.  An unknown solid in a capillary tube
was placed in water and the water heated.  The solid melted at 65 mm above the freezing point.

____________1.  What was the temperature change per mm rise in the mercury?
(oC)


____________ 2. What was the melting point of the solid?


____________ 3. Convert 85oF to degrees Celsius.


100 mL of  3 M HCl was reacted with 100 mL of 3 M NaOH.  The original temperature of the acid and
base solutions was 23oC.  After mixing the temperature rose to
55oC.

_____________4. What are the two products of the reaction of HCl + NaOH?

_____________

______________5.  How many calories were produced in this reaction?


A glass tube measured 120 mm in length and 2 mm in diameter.  This tube was placed in a 95oC oil bath. 
After the bubbles stopped coming from the tube, the tube was raised out of the oil until an oil plug formed. 
The tube was allowed to cool to room temperature 23oC.  The distance between the oil plug and the
closed end of the tube was 96 mm. 

____________ 6.  What is the volume of the air in the tube at room temperature?

____________ 7.  Whose law says that the volume of a gas is directly proportional to temperature in                                                             Kelvin?

____________ 8. To what temperature of a gas at 300oC be cooled in order for its volume tocome
                one third of the original volume if the pressue is helf constant?

____________9.  Which of the following indicators would be the best for determining the pH of
                a solution at neutral range?  (litmus paper, phenophthalein, bromthymol blue)

____________10. Milk of magnesia was ( acidic, basic, or neutral).