Name print last name Drst Locker Number Date PRELIMINARY EXE

Name print last name Drst Locker Number. Date PRELIMINARY EXERCISES: Experiment 3 The identification ot an 1. Indicate which of the following would be would be considered chemical properties of iron. considered physical properties (P) and which a. Iron reacts with oxygen to form iron oxides. p b. Iron is good conductor of heat and °lectricity. c. Iron melts at 1535 C. C d. When iron is immersed in a solution of hydrochloric acid, hydrogen is produced. gas e. Iron becomes red-hot when heated. f A 500-cc volume of iron has a mass of 3g30 g. f g. Iron can be polished to a high luster. 2. The mass of 10.00 ml, of carbon tetrachloride was measured to be 15.94 g What is the density of carbon tetrachloride? Density L5amy 3. (a) The density of water 1.00 glmL Carbon tetrachloride is insoluble in water. Would carbon tetrachloride float on water or sink beneath water when they are combined? (b) Hexane has a density of o 66 gyml, and is also insoluble in water. would bexane float on water or sink beneath water when mixed with water? 4. A student determined that an unknown was soluble an equal volume of water, had a density of approximately 0.80 liquid temperature of 55.soc. Consult gml, a boiling Table 1 and identify the liquid The liquid is

Solution

1.

a.Chemical property because iron reacts to form oxides

b.Physical property - it conducts electricity

c.physical property - melts at 1535 degree celcius

d.chemical propety - iron + hydrochloric acid gives hydrogen gas

e.physical property - iron becomes red hot on heating

f. physical property - as it measures volume

g. physical - iron can be polished to high luster.

2.

10 mL of carbontetra chloride = 15.94g

so 1 ml of carbontetra chloride will be 15.94/10 = 1.59g

3. a.Carbon tetrachloride will sink in water. As the density of carbontetrachloride is greater than water ie 1.52g/mL it sinks in the water.

b. Hexane floats in water as the density of hexane is less than the water.