UConn CHEM 1127Q - reviewfinalf14 (4 pages)

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4
School:
University Of Connecticut
Course:
Chem 1127q - General Chemistry

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REVIEW Chapters 1 9 A Consider the metal sodium 1 How many grams are there in 0 100 mole 2 How many atoms are there in 1 00 g 3 How many moles are there in 3 76 g 4 Compare sodium to potassium and magnesium with respect to a Atomic radius b Ionization energy c electronegativity 5 Compare Na to Na with respect to size 6 Write the electron configuration and orbital diagram for sodium 7 Sodium D line has a wavelength of 589 nm Calculate a Its frequency b E in kJ mol B When sodium is added to water d 1 00 g mL the following reaction occurs 2Na s 2H2O 2Na aq 2OH aq H2 g 1 How many grams of sodium will react with 10 0 mL of water 2 Five grams of sodium are added to 25 00 mL of water at 20 C Assume 100 yield for the next 4 questions a d a What is the limiting reactant b How many grams of H2 are produced c What are the masses of the reactants after the reaction is complete d What is the molarity of Na produced What is the molarity of OH produced e If only 0 100 g of H2 is produced what is the percent yield f What volume of H2 will be produced at 20 C if the gas is collected over water vp 17 54 mm Hg The barometric pressure is 754 6 mm Hg g What is the mass of a gas that will effuse times as fast as H2 3 Calculate H for the reaction 4 If 1 00 g of sodium and an excess of water reacted how much heat will be evolved 5 If the reaction is done in a bomb calorimeter heat capacity 9 33 kJ C using 2 50 g of sodium and an excess of water what is the final temperature of the system if its initial temperature is 20 00 C C Write balanced net ionic equations using smallest number coefficients to represent the reactions between aqueous solutions of the following compounds 1 Sulfuric acid and sodium hydroxide 2 Sodium hydroxide and iron III nitrate 3 Hypochlorous acid and potassium hydroxide 4 Ammonia and perchloric acid 5 Sulfite ions in a basic solution with solid cobalt III hydroxide to give sulfate ions and solid cobalt II hydroxide 6 Dichromate ions in an acidic solution with iodide ions to form chromium III ions and triodide I3 ions D Consider the reaction between aqueous solutions of scandium III chloride and silver I sulfate 1 How many mL of 0 0750 M silver sulfate is required to react completely with 200 0 mL of 0 120 M scandium III chloride 2 How many grams of precipitate can be theoretically obtained E Consider water at 20 C Its density is 1 00 g mL its vapor pressure at 20 C is 17 54 mm Hg Five grams are poured into a 20 0



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