PRACTICE EXAM IV
significant figures and units
throughout the exam!
Titanium a strong lightweight corrosion-resistant metal is prepared by the reduction of
titanium(IV)chloride with molten magnesium: TiCl
Ti + 2MgCl
Part. A. (6 pt) Calculate the theoretical yield of Ti if 148kg of TiCl
reacts with 46.5 kg of Mg.
Part B. (6 pt) Calculate the % yield if 24345 g of Ti was isolated from the reaction.
(4 pt) If a percent yield of greater than 100% had been observed, what errors were likely
(6 pt) What is the mass percent oxygen in Na
(3 pt) Label the following solutions as strongly basic, weakly basic, strongly acidic, or weakly
0.120 M NaOH
0.150 M HI
0.040 M NH