General Review
Solubility Guidelines + Predictions
Solubility Calculations
Acids + Bases
Equilibrium
100
Which of the following is/are pure substances?
I + II
100
What is the saying for predicting if one substance will dissolve in another?
Like dissolves like!
100
How many moles of HCN would be present in 1.8 L of a 0.34 M solution of HCN?
0.61 moles
100
What is the name of the following base?
NH4OH
Ammonium hydroxide
100
List the three conditions that must be satisfied for a chemical reaction to take place
Collision, Orientation, and Energy
200
What element has the following electron configuration?
1s22s22p63s23p64s13d5
Chromium
200
Which of the following aqueous solutions would be expected to have the lowest osmotic pressure?
a) 1 M C6H12O6
b) 1 M CH4O
c) 1 M KNO3
d) 1 M CaCl2
e) 1 M NaCl
D) 1 M CaCl2
200
What is the volume (ml) of a 12.0 M HCl solution that contains 3.60 moles of HCl?
300. mL
200
What is the formula for phosphorous acid?
H3PO3
200
2 AlCl3 (aq) + 3 K2SO4 (aq) ⇄ Al2(SO4)3 (aq) + 6 KCl(aq)
Write the equilibrium equation
Kc = ([Al2(SO4)3] [KCl]6)/([AlCl3]2 [K2SO4]3)
300
What is the name of the molecule with the chemical formula (NH4)2CO3 ?
Ammonium carbonate
300
The solubility of KI is 50 g in 100 g of H2O at 20 °C. If 110 grams of KI are added to 200 grams of H2O,
A) all of the KI will dissolve.
B) the solution will freeze.
C) the solution will start boiling.
D) a saturated solution will form.
E) the solution will be unsaturated.
D) a saturated solution will form.
300
What volume (mL) of a 10.5 M solution of sodium hydroxide (NaOH) must be diluted to prepare a 200. mL solution of 1.75 M sodium hydroxide?
33.3 ml
300
Identify the following as a weak acid, a weak base, a strong acid, and a strong base
HI(aq) + H2O(l) --> I-(aq) + H3O+(aq)
HCN(aq) + H2O(l) --><-- CN-(aq) + H3O+(aq)
CH3NH2(aq)+ H2O(l) --><-- CH3NH3+(aq)+OH-(aq)
LiOH(aq) --> Li+(aq) + OH-(aq)1. Strong Acid
2. Weak Acid
3. Weak Base
4. Strong Base
300
Consider the reaction 3 O2(g) + 4 NH3(g) ⇄ 6H2O(l) + 2 N2 (g)
Determine Kc if at 100 C, the reaction mixture at equilibrium contains 0.25 M O2, 0.43 M NH3, and 0.18 M N2 .
Kc = 60.65
400
Calculate the specific heat capacity of a metal if a 17.0 g sample requires 481 J to change the temperature of the metal from 25.0 °C to 67.0 °C?
Q=mc(change in T)
0.674 J/g°C
400
Based on the solubility guidelines, which of the following cations would form a precipitate in water with phosphate anion, but not with chloride anion?
A) Rb+
B) NH4+
C) Pb2+
D) K+
E) Ba2+
E) Ba2+
400
How many grams of CaCl2 would one need to dissolve in sufficient water to make a 500. mL solution with a molarity of 0.120 M? (CaCl2 is 110.984 g/mol)
6.66 g of CaCl2
400
HNO3(aq) + H2O(l) --><-- NO3- + H3O+
Identify the acid, the base, the con. acid, and the con. base in this reaction
Acid: HNO3 (Nitric acid)
Base: H2O (Dihydrogen monoxide)
Con. acid: H3O+ (Hydronium ion)
Con. base: NO3- (Nitrate)
400
Consider the reaction:
C3H8(g) + 5 O2(g) --><-- 3 CO2(g) + 4 H2O(g)
If I were to INCREASE the volume of this container, how would that effect the equilibrium?
The reaction will shift more toward the products
500
Consider the reaction…
2 C6H14 + 19 O2 → 12 CO2 + 14 H2O
If an initial mixture contains 173.0 grams of C6H14 and 324.0 grams of O2, how many grams of CO2 are produced?
C = 12.01 g/mol O = 16.00 g/mol
H = 1.008 g/mol
281.4 grams
500
Which pair of compounds will form a solution
A) H2O + CF4
B) CH4 + CH3Cl
C) MgO + C3H8
D) NH3 + CH3NH2
E) C6H5NH2 + C6H14
D)
500
According to the reaction given below, how many grams of solid Fe(OH)2 is formed when 175 mL of 2.27 M aqueous LiOH reacts with excess aqueous FeCl2? (Note: Molar Mass of Fe(OH)2 is 89.859 g/mol)
FeCl2(aq) + 2 LiOH(aq) → Fe(OH)2(s) + 2 LiCl(aq)
17.8 g
500
Determine which of the following acids are strong acids:
HCl
HF
H2CO3
HClO4
H2SO4
HCl (Hydrochloric Acid)
HClO4 (Perchloric acid)
H2SO4 (Sulfuric Acid)
500
The equilibrium constant for the reaction for the decomposition of PCl5 to chlorine and PCl3 at a certain temperature is 0.042
PCl5(g) ⇌ PCl3(g)+ Cl2(g)
If the equilibrium concentrations are [PCl3] = 0.010 M, [Cl2] = 0.10 M, what is the value of [PCl5]?
0.024 M