Exam 1 Stuff
What is the charge of a Titanium ion that contains 18 electrons?
+4 charge
What is the noble gas configuration of gallium (Ga)?
[Ar] 3d104s24p1
How many moles of carbon are there in 1.98 moles of C6H12O6?
11.9 moles of carbon
List the difference between a Bronsted-Lowry base and a conjugate base.
A Bronsted-Lowry base accepts a proton, and a conjugate base is the result of an acid donating a base.
Fill in the blanks:
A(n) _____ agent results from oxidation and a(n)_____ agent results from reduction.
A reducing agent results from oxidation, and an oxidizing agent results from reduction.
Name this compound and what type of naming compound this is? - SnSe2
( Tin(IV) selenide)- Ionic Transition Metal
A 35 L tank of oxygen is at 315 K with an internal pressure of 190 atmospheres. How many moles of gas does the tank contain?
260 moles of oxygen gas
If I add 100.0 mL of a 0.15 M NaOH solution until the final volume is 150.0 mL what will the molarity of the diluted solution be?
0.10 M NaOH
List what ranges on the pH scale are basic, neutral, and acidic?
< 7 is acidic, =7 is neutral, and >7 is basic
What kind of equation is this and why?
HCl + NaOH --> NaCl + H2O
Acid/Base equation
An acid and a base react to create water and a salt as a product.
What is the net ionic equation of
MgSO4 (aq) + BaCl2 (aq) --> MgCl2 (aq) + BaSO4 (s)
(Be sure to include charges and states of matter)
Ba+2 (aq) + SO4-2 (aq) --> BaSO4 (s)
What molecule does not share a bonding characteristic with its neighbors?
H2O, HF, CH2Cl2
CH2Cl2 is the wrong one as it does not contain hydrogen bonding. Standard hydrogen bonding is with O, N, or F.
If you have 35.43 g of NaCl and add water to make 125.0 mL solution, what is its molarity?
4.850 M NaCl
What two things affect the rate of a reaction?
concentration and temperature
Balance the following equation:
_Fe2O3 + _C → _Fe + _CO2
2 Fe2O3 + 3 C → 4 Fe + 3 CO2
Determine the empirical formula for the following compound with the percent masses: 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen.
CH2O
What is the electron geometry and molecular geometry of NH3?
Electron Geometry: Tetrahedral
Molecular Geometry: Trigonal pyramidal
If you end up with 2.92 moles of HF, but you theoretically can get 67.0 grams of HF from your experiment. What is the percent yield?
87.2 % of HF
Identify the BL acid/base and identify the conjugate acid/base in this equation.
CO32-(aq) + H2O(l) →HCO3-(aq) + OH-(aq)
CO32-(aq)= base, H2O(l) = acid, HCO3-(aq)= conjugate acid, OH-(aq)= conjugate base
What is the equilibrium constant for the following reaction? And what does the equilibrium favor? [NO]=2.4 x10-3 M, [O2]=1.4 x10-4 M, [NO2]=0.95 M
2NO (g) + O2 (g) <----> 2NO2 (g)
Keq:1.1 x 109
The equilibrium lies to the right meaning that it favors the products.
Calculate the amount of heat required to heat a 802g sample of ethanol from 285k to 298k. The specific heat capacity of ethanol is 2.42 J/goC. What is the answer in KJ?
q=mcΔT
25.2 KJ
List the three things that increase the rate of vaporization of a liquid?
1) Increasing surface area
2) Increasing temperature
3) Decreasing strength of intermolecular forces
4 HCl(aq) + MnO2(s) -> MnCl2(aq) + 2 H20(l) + Cl2 (g)
If you have 42.4g of MnO2 and 50.7g HCl, which reactant is limiting and how many grams will be produced?
(PS. Focus on Cl2 as a product)
HCl is the limiting reactant, and 24.65 g of Cl2 will be produced.
The titration of 10.00 mL of an HCl solution of unknown concentration requires 45.45 mL of a 0.200 M NaOH solution to reach the equivalence point.
What is the concentration of the unknown HCl solution?
0.909 M of HCl
Which element is being reduced and which element is being oxidized?
Ca + H2O → CaO + H2
Oxidized: Calcium, from 0 to +2
Reduced: Hydrogen, from +1 to 0