chem review

· Determine if the following compounds were placed in water would they form and electrolyte solution. Write Electrolyte or Non-Electrolyte (12 pts)

· NiS

· MgCl2

· HNO3

· C3H7OH

· Indicate as soluble or insoluble in water (15pts)

· Fe2(CO3)3_____________________

· MgBr2 __________________

· Na2CO3 _________________

· BaSO4 __________________

· Pu(NO3)2____________________

· Using the solubility rules provided, Indicate which reactions between aqueous reagents will produce a precipitate. If they produce a precipitate indicate the identity of the precipitate. (18 pts)

Precipitate (Yes/No) Identity of Precipitate

· Ba(NO3)2+ KOH ______________ ________________

· NiCl2+ Hg2(NO3)2 ______________ ________________

· LiOH+NiCl2 ______________ ________________

· Using the solubility rules provided in your textbook, If a solution of lead (II) nitrate (Pb(NO3)2) were added to a solution containing Magnesium Nitrate (Mg(NO3)2) and Iron Bromide (FeBr2) what precipitates if any would form. Give the chemical formulas of the precipitates. If no precipitates are formed write “No precipitates formed) (10 pts)

· Using the solubility rules provided in your textbook , If a solution of sodium fluoride (NaF) were added to a solution containing Magnesium nitrate (Mg(NO3)2), Silver nitrate (AgNO3) and Barium nitrate (Ba(NO3)2 what precipitates if any would form. Give the chemical formulas of the precipitates. If no precipitates are formed write “No precipitates formed) (10 pts)

· Given the reaction : 6KOH (aq) + Fe2(SO4 )3(aq) → 2Fe(OH)3(s)+ 3K2SO4(aq) (10 pts)

· Write the balanced complete ionic equation for the reaction (5pts)

· Write the balanced net ionic equation for the reaction (5pts)

· (10 pts) Given the reaction : 2HCl (aq) + Na2CO3 (aq) → CO2 (g) + H2O(l) + 2NaCl(aq)

· Write the balanced complete ionic equation for the reaction (5pts)

· Write the balanced net ionic equation for the reaction (5pts)

· (10 pts) For a 1.8 M solution of AlCl3 determine the concentration in molarity (M) of aluminum ions (Al3+) and chloride ions (Cl-)

· (15 pts) An aqueous solution has a hydrogen ion (H+) concentration of 2.5×10-5 M

· What is the pH of the solution

· What is the pOH of the solution

· What is the OH- concentration of the solution in molarity (M)

· Is this solution acidic, basic or neutral?

· (15 pts) An aqueous solution has a pOH of 3 a. Is this solution acidic, basic or neutral ?

· What is the pH of this solution ?

· What is the hydrogen ion (H+) concentration in this solution in molarity (M)

· What is the hydroxide ion (OH-) concentration in this solution in molarity (M)

· (10 pts) Determine the pH of the following solutions, assume 100% dissociation of the ionic species.

· 3.25 x10-3 M H2SO4

· 1.86 x 10-2 M RbOH

· (15 pts) A weather balloon at ground level where the pressure is 745 mm Hg and the temperature is 19oC has a volume of 20 L. The balloon ascends to an altitude 1000 ft where the temperature is 0oC . The volume of the balloon increased to 25 L. What is the pressure inside the balloon at 1000 ft.

· (15 pts) A container fitted with a movable piston has a volume of 25.5 L and pressure of 2500 Torr What will the volume of the container be if the piston is allowed to move allowing the volume to increase until the pressure in the container reaches a pressure of 760 Torr.

· (20 pts) It is known that a 4.5L container contains 1.2 moles of Nitrogen and 3.2 moles of Hydrogen. If the container is at 32oC

· what is the pressure in the container

· What is the partial pressure of Hydrogen in the container.

· (20 pts) An unknown mass of sodium (Na) is reacted with an excess of water according to the reaction given below. If 85.5 ml of hydrogen is collected at 15oC and 720 mmHg, what mass of sodium was reacted with water.

2Na + 2H2O → 2NaOH + H2

·

· (24 pts) Draw the Lewis structures for the following compounds You must show all bonds and lone pairs for the Lewis Structures

· CO

Lewis Structure:

· SiS2 (Silicon is the central atom)

Lewis Structure:

· ClO2- (Cl is the central atom)

Lewis Structure:

· C2H2

Lewis Structure:

· SeO2 (Selenium is the central atom)

Lewis Structure:

· AsO3- (Arsenic is the central atom)

Lewis Structure: