Name:__________________________ Date:________________ Period:____
Solutions Bell Ringers – Show all Work
1/24/11 – Gas Laws and Kinetic Molecular Theory EXAM
a) How many moles are 54 g of NaCl?
b) If you add 64 grams of Fe(OH)2 to 100 mL, how many moles did you add?
1/25/11: Phase Changes
How many milligrams are there in one kilogram?
1/26/11: GA Notes Solutions Introduction
a) Calculate the
averages
b) Suppose student C had an average of 83%. On each of his five tests he scored either 65% or
95%. Which score occurred more often? Explain
1/27/11 GA Notes Solutions Introduction/Practice
1/28/11 Solubility Curves Draw the Lewis Dot Structure for the following:
a) H2O (oxygen is central)
b) NaCl
c) Explain how to bond (Covalent or Ionic)
1/31/11 Solubility Curves, Molarity Practice, Formative
How many oxygen atoms are in each of the following: _____ a) Al2O3 _____ b) 3 Na2O
_____ c) 4 Na2SO4 _____ d) 5 Mg(NO3)2
Dissolving is caused at the molecular level by
A. ionic forces.
B. osmosis.
C. random motion.
D. weight.
Balance the following equation:
_____ CaCl2 + _____ Li2O _ _____ CaO + _____ LiCl
2/1/11 CASHEE (10th,12th) Percent Solutions
A container of gas with a total pressure of 450 kPa contained three different gases—hydrogen,
oxygen and nitrogen. If the partial pressure of hydrogen was 210 kPa and the partial pressure of
oxygen was 125 kPa, what was the partial pressure of nitrogen?
Calculate the molarity of each of the following solutions.
a) A solution is prepared by dissolving 24.9 g of CaCl2 in 210 mL of solution.
b) A solution contains 12.9 g of Na2SO4 in 325 mL of solution.
2/2/11
How many grams are needed to produce 425 mL of a 3.25 M solution?
2/3/11 Review for EXAM
If 2.75 moles of a certain compound has a mass of 125.9 g, what is the molar mass of the
compound?
Consider the terms "concentrated" and "dilute". Are these qualitative or quantitative terms,
explain the difference?
2/4/11 EXAM - Turn in Bellringers
How will adding salt to water affect the boiling point of water?
A. It will lower the boiling point.
C. It will not affect the boiling point.
B. It will raise the boiling point.
D. Water will not be able to boil.