Molarity and Titration
What is the volume of 17g of a 0.95 M solution of NaOH?
0.45 L
What precipitation will form from the reaction of (NH4)3PO4 and Zn(NO3)2?
Zn3(PO4)2 (Zinc Phosphate)
When an element within a molecule gets oxidized, what happens to its oxidation number? Its charge?
Oxidation number increases
Charge becomes more positive.
Under what conditions will real gasses obey the ideal gas law?
Low pressures and high temperatures
What is the value of "n" for lead (Pb)?
6
What is the molarity of the mixture of two solutions, given 10 liters of a 4.0 M solution HCl and 40 liters of a 2.0 M solution HCl?
2.4 M
What precipitation will form from the reaction of potassium hydroxide and hydrochloric acid?
Water (H2O)
What is the oxidation number of any element NOT contained within a molecule?
Always 0
What is the density of nitrite vapor at 798 torr and 122°C?
1.49 g/L
What are the possible values of "l" if "n" = 2? And what orbitals do these "l" values represent?
0, 1
0 represents the s orbital
1 represents the p orbital
A 250 mL solution of 0.44 M NaOH is titrated until it is neutralized with a 65 mL solution of HCl. What is the concentration of the HCl solution? (Assume a 1 to 3 reaction)
5.1 M
What precipitation will form from the reaction of Na3PO4 and Cs2Cr2O7?
None (No reaction occurs)
What is the oxidation number of manganese in Mg(MnO4)2?
+7
What is the molar mass of gas X if it effuses 1.41 times as rapidly as H2 (g)?
1.01 g/mol
What are the values of "ml" if "n" = 3?
-2, -1, 0, 1, 2
Given the following unbalanced chemical reaction,
H2SO4 + NaOH → Na2SO4 + H2O
If 57.1 mL of 0.198 M NaOH reacts with 46.0 mL of H2SO4, what is the concentration of the H2SO4 solution?
0.123 M
Give the net ionic equation for the reaction that occurs when aqueous solutions of Mg(NO3)2 and Na2CrO4?
Mg2+ (aq) + CrO42- (aq) -> MgCrO4 (s)
Identify what is being oxidized and reduced in this redox reaction.
4Fe (s) + 3O2 (g) → 2Fe2O3 (s)
Reduced: Oxygen
Oxidized: Iron
A 3.50 L mixture of helium and chlorine gas is kept at a temperature of 231 K. If the helium gas has a partial pressure of 176 mmHg and the mixture contains 12.1 g of chlorine gas what is the total pressure of the gas mixture?
878 mmHg
How many electrons can the s, p, and d orbitals hold respectively?
s = 2
p = 6
d = 10
The titration of 80.0 mL of an unknown concentration H3PO4 solution requires 126 mL of 0.218 M KOH solution. Given the following unbalanced chemical equation, what is the concentration of the H3PO4 solution?
KOH (aq) + H3PO4 (aq) → K3PO4 (aq) + H2O(l)
0.114 M
Give two examples of reagents that could be used to separate I- from ClO4-.
Any Heavy Metal + Any Rule 2 Anion
In the following reaction, which element is the reducing agent?
6CO2 (g) + 6H2O (l) → C6H12O6 (s) + 6O2 (g)
Oxygen
What is the observed pressure for 225 mL of Cl2 at 295 K using Van der Waal's equation? (Use a = 5.42, b = 0.0540, n = 2.50)
3.30 atm
Draw the three p orbitals (x, y, and z) with labeled graphs.
Great drawing!