Solubility
Polar/Nonpolar/Ionic
Concentration
Acids/Bases
Calculations
100
Name two ions that will ALWAYS make an ionic compound soluble.
See Rule 1 on solubility chart on reference sheet.
Na+1 , Li+1, NH4+1, NO3-1 etc.
100
Unequal sharing of electrons
Polar covalent
100
What is the equation used to calculate the molarity of a solution?
Molarity = # moles/# Liters
100
Turns blue litmus paper red
Acids
100
What is the molar mass of Cu(N2H3)3?
156.7 g
200
Which solute is least soluble at 00 C?
KClO3
200
Substance that when it is dissolved in water will conduct electricity
Ionic
200
What is the concentration of a 2 L solution of NaCl that contains 2.5 moles of NaCl?
1.25 M
200
Tell whether each refers to an acid, base, or salt.
1.) pH = 5
2.) [OH-1] > [H+1]
1. acid
2. base
200
How many times more acidic is a solution with a pH of 4 than a solution with a pH of 2?
100X
300
Is a solution made by dissolving 30 g of KNO3 in 100 g of water at 300 C saturated, unsaturated, or supersaturated?
Unsaturated
300
Tell wh2ether each of the following molecules are polar covalent, nonpolar covalent, or ionic.
H2O
O2
LiF
H2O - polar covalent
O2 - nonpolar covalent
LiF - ionic
300
What is the concentration of a 100 mL solution that contains 15 g of NaCl?
2.56 M
300
What is the pH of a solution that has a [H+1] of 2.9 x 10-5 M ?
4.5
300
How many moles are in 100 g of H2O?
5.56 moles
400
Which of the following ionic compounds will dissolve in water?
BaSO4
KClO3
AgI
NaOH
CaCO3
NaOH, KClO3
400
Which of the following molecules contain covalent bonds?
NO2
CH4
CaCl2
SF6
Fe2O3
NO2 -Covalent
CH4 - Covalent
CaCl2 - Ionic
SF6 - Covalent
Fe2O3 - Ionic
400
How many grams of NaCl are needed to make 1 L of a 0.25 M solution?
14.61 g NaCl (0.25 moles)
400
What is the [OH-1] for a solution with a pH of 4.8?
6.31 x 10-10 M
400
How many grams are in 0.456 moles of NaCl?
26.65 g
500
What is the solubility of KNO3 in 50 g of water at 300C?
~ 22 grams (1/2 of the amount that can dissolve in 100 g)
500
Give two similarities and two differences between ionic and covalent bonds.
Similar: bond two atoms together, increase the stability of the atoms, bonds involve electrons
Different: Share vs. transfer electrons, small difference in electronegativity vs. large difference, two nonmetals vs. metal and nonmetal
500
Describe two ways to increase the concentration of a solution.
1.) add more solute without adding more water
2.) evaporate some of the water
500
A solution contains 15 g of HCl in 750 mL of solution. What is the solution's pH?
0.26
500
How many molecules are in 50 g of H2O?
1.67 x 1024