Solutions
Limiting Reagents
Acids, Bases, and Titrations
Miscellaneous
Throwback
100
How many moles of solute are in 35 mL of a 0.5 M solution?
0.0175 moles
100
What are the molar ratios between the reactants and copper (II) hydroxide in this reaction:
CuSO4 + NaOH -> Cu(OH)2 + Na2SO4
CuSO4: 1:1
NaOH: 2:1100
Identify the following as acids or bases:
NH4OH, Ca(OH)2, HBr, HOH1. NH4OH: Base
2. Ca(OH)2: Base
3. HBr: Acid
4. HOH: Both
100
In order to determine stoichiometry an equation must be:
Balanced
100
Provide 5 SI measurements
-Mass
-Moles
-Temperature
-Light
-Length
-Time
-Ampere200
The solvent and solute in "NaCl (s) + HF (aq)"
Solvent: Water (see the aq)
Solute: HF
NaCl is a common solute, but is not dissolved into a solvent in this situation200
Define the term "excess reagent"
The reagent that is leftover after a reaction runs to completion (i.e. not consumed in a reaction)
200
The two products of any neutralization reaction
Water (HOH) and salt (an ionic compound)
200
The term for the maximum amount of product that can be produced from a reaction
Theoretical yield
200
State the charge and location of a proton, neutron, an electron
Proton: +1, nucleus
Neutron: 0, nucleus
Electron: -1, orbital
300
The four factors that affect solubility:
Double points if you can show how they affect solubility
Pressure (Positive correlation)
Temperature (Positive correlation)
Amount of solute (Negative correlation)
Polarity (Like dissolves like)
300
3 moles of hydrogen gas combine with one mole of nitrogen gas to create two moles of ammonia. What is the limiting reagent? What is the excess reagent?
Both reagents are limiting. There is no excess
300
Draw a titration setup
300
Provide 3 ways you can study for our final
Answers will vary
300
Define mass as determined by relative abundance
The average mass of an element based on the percentage of each isotope that makes up that element in nature
400
Determine the volume of 0.5 M sodium hydroxide necessary to create 300 mL of a 0.4 M dilution
240 mL
400
You are given 81 g of aluminum and 210 g of chlorine gas. What is the limiting reagent in the reaction?
Chlorine gas
400
The titration of 50.0 ml of HCl solution of an unknown concentration requires 15 ml of a 0.100 M NaOH solution to reach the equivalence point. Determine the concentration of the unknown HCl solution:
0.03 M
400
Explain how to make a solution. Proper equipment must be described
Combine solute and less than necessary amount of solvent. Transfer contents to volumetric flask (while rinsing previous container with solvent and transferring said mix to flask). Raise solvent to required volume in volumetric flask.
400
Convert this word equation into chemical form:
1 mole of solid iron (IV) chloride reacts with 2 moles of aqueous sodium sulfide to form a mole of solid iron (IV) sulfide and 4 moles of sodium chloride solution
FeCl4 (s) + 2 Na2S (aq) -> FeS2 (s) + 4 NaCl (aq)
500
A scientist mixes 30 g of carbon into 5 dm3 of water. What is the molarity of their solution?
0.5 M
500
56 g of ethylene (C2H4) reacts with 48 grams of oxygen gas to produce carbon dioxide and water. How many moles of water will be produced?
0.5 moles of water
500
The titration of 0.1 dm3 of a H2SO4 solution of an unknown concentration requires 50 ml of a 0.300 M NaOH solution to reach the equivalence point. Determine the concentration of the unknown H2SO4 solution:
0.075 moles
500
The five reasons theoretical and actual yield may differ
Loss of mass from transferring, spills, etc.
Uncertainty in measurements
Reaction did not go to completion
Reactants reacted with unintended particles (ex. particles in the air, leftover in a dish, etc.)
Products are not pure
500
Congratulations on getting to this point in the class. I am proud of the work all of you have put in and how much you have all helped each other.
Take a free +500 points for the road