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.
Out of the four main gas laws, which has its variables inversely related to each other?
Boyle's Law
What is the value of R with units of J/mol*K?
8.314
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 elements NOT contained within a molecule?
Always 0
What happens to the volume of a gas if its pressure and temperature are each tripled?
It stays the same
Under what conditions will real gasses obey the ideal gas law?
Low pressures and High temperatures
A 25mL solution of 0.60 M NaOH is titrated until it is neutralized with a 60.mL solution of HCl. What is the concentration of the HCl solution? (Assume a 1 to 1 reaction)
0.25 M
What precipitation will form from the reaction of LiOH and BaCl2?
None (No reaction occurs!)
What is the oxidation number of chromium in K2Cr2O7?
+6
Calculate the temperature (in oC) at which 23.41 g of neon gas occupies 12.30 L at 1.953 atm.
-23.05 oC
What is the speed of krypton at 80.0 oF?
299 m/s
Given the following unbalanced chemical reaction,
H2SO4 + NaOH → Na2SO4 + H2O
If 43.2 mL of 0.236 M NaOH reacts with 36.7 mL of H2SO4, what is the concentration of the H2SO4 solution?
0.139 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)
In the following reaction, which element is the reducing agent? 2K(s) + Br2(ℓ) → 2KBr(s)
Potassium
What is the density of ammonium vapor at 714 torr and 125°C?
0.518 g/mol
What is the molar mass of gas X if it effuses 0.876 times as rapidly as N2 (g)?
36.5 g/mol
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
Identify what is being oxidized and reduced in this redox reaction. 2NO + Cl2 → 2NOCl
Oxidized: Nitrogen
Reduced: Chlorine
At a temperature of 300.K, 30.0 liters of gas A kept under pressure of 1.0 atm and 15 liters of gas B kept under pressure of 2.0 atm is transferred into an empty 10.L container. Calculate the partial pressures of gas A and gas B.
Gas B = 3.0 atm
What is the value of 'b' for 125 mL of Cl2 at 355 K and 1.50 atm using Van der Waal's equation? (Use a = 6.49, and n = 1.00)
0.055